Chinese Journal of Catalysis最新文献_第8页

In-situ SEIRAS for dynamic single-atom catalysis 动态单原子催化的原位SEIRAS

IF 17.7 1区化学 Q1 CHEMISTRY, APPLIED

Chinese Journal of Catalysis

Pub Date : 2025-09-15 DOI: 10.1016/S1872-2067(25)64789-9

Haifeng Qi, Graham J. Hutchings

引用次数: 0

Constructing high-entropy spinel oxide thin films via magnetron sputtering for efficiently electrocatalyzing alkaline oxygen evolution reaction 磁控溅射制备高熵尖晶石氧化薄膜，用于高效电催化碱性析氧反应

IF 17.7 1区化学 Q1 CHEMISTRY, APPLIED

Chinese Journal of Catalysis

Pub Date : 2025-09-15 DOI: 10.1016/S1872-2067(25)64771-1

Yuhui Chen, Congbao Guo, Yi Wang, Kun Wang, Shuqin Song

Ensuring high electrocatalytic performance simultaneously with low or even no precious-metal usage is still a big challenge for the development of electrocatalysts toward oxygen evolution reaction (OER) in anion exchange membrane water electrolysis. Here, homogeneous high entropy oxide (HEO) film is in-situ fabricated on nickel foam (NF) substrate via magnetron sputtering technology without annealing process in air, which is composed of many spinel-structured (FeCoNiCrMo)₃O₄ grains with an average particle size of 2.5 nm. The resulting HEO film (abbreviated as (FeCoNiCrMo)₃O₄) exhibits a superior OER performance with a low OER overpotential of 216 mV at 10 mA cm^–2 and steadily operates at 100 mA cm^–2 for 200 h with a decay of only 272 μV h^–1, which is far better than that of commercial IrO₂ catalyst (290 mV, 1090 μV h^–1). Tetramethylammonium cation (TMA⁺) probe experiment, activation energy analysis and theoretical calculations unveil that the OER on (FeCoNiCrMo)₃O₄ follows an adsorbate evolution mechanism pathway, where the energy barrier of rate-determining step for OER on (FeCoNiCrMo)₃O₄ is substantially lowered. Also, methanol molecular probe experiment suggests that a weakened *OH bonding on the (FeCoNiCrMo)₃O₄ surface and a rapid deprotonation of *OH, further enhancing its OER performance. This work provides a feasible solution for designing efficient high entropy oxides electrocatalysts for OER, accelerating the practical process of water electrolysis for H₂ production.

在保证高电催化性能的同时，低甚至不使用贵金属，仍然是阴离子交换膜电解中析氧反应（OER）电催化剂发展的一大挑战。本文采用磁控溅射技术在泡沫镍（NF）衬底上原位制备了均匀的高熵氧化物（HEO）薄膜，该薄膜由许多尖晶石结构（FeCoNiCrMo）3O4晶粒组成，平均粒径为2.5 nm。制备的HEO薄膜（简称FeCoNiCrMo）3O4)在10 mA cm-2下OER过电位为216 mV，在100 mA cm-2下稳定工作200 h，衰减仅为272 μV h - 1，远优于工业IrO2催化剂（290 mV, 1090 μV h - 1）。四甲基铵离子（TMA+）探针实验、活化能分析和理论计算表明，（FeCoNiCrMo）3O4上的OER遵循吸附质演化机制途径，其中OER在（FeCoNiCrMo）3O4上的速率决定步骤的能垒大幅降低。甲醇分子探针实验表明，（FeCoNiCrMo）3O4表面的*OH键减弱，*OH快速去质子化，进一步提高了OER性能。本研究为设计高效的OER高熵氧化物电催化剂提供了可行的解决方案，加快了水电解制氢的实际过程。

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引用次数: 0

Mechanistic insights into sulfation-induced deactivation of CoMn2O4/CeTiOx catalyst under low-temperature SCR conditions 低温SCR条件下磺化诱导CoMn2O4/CeTiOx催化剂失活机理研究

IF 17.7 1区化学 Q1 CHEMISTRY, APPLIED

Chinese Journal of Catalysis

Pub Date : 2025-09-15 DOI: 10.1016/S1872-2067(25)64781-4

Ning Luo , Fengyu Gao , Chengzhi Wang , Honghong Yi , Shunzheng Zhao , Yuansong Zhou , Shangfeng Du , Xiaolong Tang

The problem of water and sulfur poisoning in flue gas atmosphere remains a significant obstacle for low-temperature deNO_x catalysts. This study investigated the sulfation mechanism of the CoMn₂O₄/CeTiO_x (CMCT) catalyst during the selective catalytic reduction of NO_x with NH₃ under conditions containing H₂O and SO₂ at 150 °C. Employing a comprehensive suite of time-resolved analysis and characterization techniques, the evolution of sulfate species was systematically categorized into three stages: initial rapid surface sulfate accumulation, the transformation of surface sulfates to bulk metal sulfates, and partial sulfates decomposition after the removal of H₂O and SO₂. These findings indicate that bulk metal sulfates irreversibly deactivate the catalyst by distorting active component lattices and consuming oxygen vacancies, whereas surface sulfates (including ammonium sulfates and surface-coordinated metal sulfates) cause reversible performance loss through decomposition. Furthermore, the competitive adsorption of H₂O and SO₂ significantly influences the catalytic efficiency, with H₂O suppressing SO₂ adsorption while simultaneously enhancing the formation of Brönsted acid sites. This research underscores the critical role of sulfate dynamics on catalyst performance, revealing the enhanced SO₂ resistance of the Eley-Rideal mechanism facilitated by the Ce-Ti support relative to the Langmuir-Hinshelwood pathway. Collectively, the study unravels the complex interplay of sulfate dynamics influencing catalyst performance and provides potential approaches to mitigate deactivation in demanding atmospheric conditions.

烟气大气中的水和硫中毒问题仍然是低温脱硝催化剂的重要障碍。研究了CoMn2O4/CeTiOx （CMCT）催化剂在150℃含H2O和SO2条件下，NH3选择性催化还原NOx时的硫化机理。采用一套全面的时间分辨分析和表征技术，将硫酸盐物种的演变系统地分为三个阶段：最初的快速表面硫酸盐积累，表面硫酸盐向大块金属硫酸盐的转化，以及去除H2O和SO2后的部分硫酸盐分解。这些发现表明，大块金属硫酸盐通过扭曲活性组分晶格和消耗氧空位而不可逆地使催化剂失活，而表面硫酸盐（包括硫酸铵和表面配位金属硫酸盐）通过分解导致可逆的性能损失。此外，H2O和SO2的竞争吸附显著影响催化效率，H2O抑制SO2的吸附，同时促进Brönsted酸位的形成。本研究强调了硫酸盐动力学对催化剂性能的关键作用，揭示了相对于Langmuir-Hinshelwood途径，Ce-Ti载体促进了Eley-Rideal机制对SO2抗性的增强。总的来说，该研究揭示了硫酸盐动力学影响催化剂性能的复杂相互作用，并提供了在苛刻的大气条件下减轻失活的潜在方法。

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引用次数: 0

Quantitative correlation of Fe(III) electronic structure regulation in peroxymonosulfate activation via atomic cobalt doping AgFeO2 原子钴掺杂AgFeO2对过氧单硫酸盐活化中Fe（III）电子结构调控的定量关联

IF 17.7 1区化学 Q1 CHEMISTRY, APPLIED

Chinese Journal of Catalysis

Pub Date : 2025-09-15 DOI: 10.1016/S1872-2067(25)64784-X

Chen Xu , Di Song , Xinggang Liu , Fang Deng , Yongcai Zhang , Mingshan Zhu , Xijun Liu , Jianping Zou , Xubiao Luo

The influence of electronic structure on the performance of catalysts for peroxymonosulfate (PMS) activation remains ambiguous. In this study, the 3d electron configuration of Fe(III) in AgFeO₂ was atomically regulated using cobalt doping. The amount of PMS adsorbed and the catalytic performance were positively correlated with the total effective magnetic moment and the ratios of high-spin Fe(III) and e_g filling within the catalysts. These 3d electron regulations favor PMS adsorption and electron transfer owing to the lower PMS adsorption energy, increased electronic states near the Fermi level, and reduced dz² orbital occupancy. Benefiting from fine tailoring of the electron configuration, the AgFe_0.80Co_0.20O₂ catalyst exhibited outstanding catalytic PMS activation and favorable application potential, achieving efficient pharmaceutical wastewater treatment and more than 80% ofloxacin removal after 72 h of continuous-flow operation. Notably, this study offers a comprehensive understanding for the influence mechanism of electronic structure regulation on PMS activation, providing design guidance for the development of efficient heterogeneous Fenton-like catalytic systems.

电子结构对过氧单硫酸盐催化剂（PMS）活化性能的影响尚不清楚。在本研究中，使用钴掺杂原子调节AgFeO2中Fe（III）的三维电子构型。PMS吸附量和催化性能与总有效磁矩、高自旋Fe（III）和eg填充率呈正相关。这些三维电子调控有利于PMS吸附和电子转移，因为PMS吸附能较低，费米能级附近电子态增加，dz2轨道占用减少。得益于电子组态的精细定制，AgFe0.80Co0.20O2催化剂表现出了出色的PMS催化活性和良好的应用潜力，在连续运行72 h后实现了高效的制药废水处理，氧氟沙星去除率超过80%。值得注意的是，本研究全面了解了电子结构调控对PMS活化的影响机制，为开发高效的非均相类芬顿催化体系提供了设计指导。

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引用次数: 0

Non-thermal plasma to boost lattice oxygen activation in Ce1-xCoxO2-δ catalysts for efficient soot combustion at low temperatures 非热等离子体提高Ce1-xCoxO2-δ催化剂的晶格氧活性，用于低温高效煤烟燃烧

IF 17.7 1区化学 Q1 CHEMISTRY, APPLIED

Chinese Journal of Catalysis

Pub Date : 2025-09-15 DOI: 10.1016/S1872-2067(25)64775-9

Feiyang Zhang , Yanjun Chen , Mengyao Sun , Peng Wang , Yuxin Miao , Zhongyang Zheng , Shixin Liu , Xuehua Yu , Zhen Zhao

Effective lattice oxygen (O_latt) activation at low temperatures has long been a challenge in catalytic oxidation reactions. Traditional thermal catalytic soot combustion, even with Pt/Pd catalysts, is inefficient at exhaust temperatures below 200 °C, particularly under conditions of frequent idling. Herein, we report an effective strategy utilizing non-thermal plasma (NTP) to activate O_latt in Ce_1–xCo_xO_2–δ catalysts, achieving dramatic enhancement of the soot combustion rate at low temperatures. At 200 °C and 4.3 W (discharge power, P_dis), NTP-Ce_0.8Co_0.2O_2–δ achieved 96.9% soot conversion (X_C), 99.0% CO₂ selectivity (S(CO₂)) and a maximum energy conversion efficiency (E_max) of 14.7 g kWh^–1. Compared with previously reported results, NTP-Ce_0.8Co_0.2O_2–δ exhibits the highest S(CO₂) and E_max values. Remarkably, even without heating, X_C, E_max, and S(CO₂) reached 92.1%, 6.1 g kWh^–1, and 97.5%, respectively, at 6.3 W (P_dis). The results of characterization and theoretical calculation demonstrated that Co dopes into the CeO₂ crystal lattice and forms an asymmetric Ce–O–Co structure, making oxygen “easy come, easy go”, thereby enabling the rapid combustion of soot over NTP-Ce_0.8Co_0.2O_2–δ. This study highlights the great potential of NTP for activating O_latt and provides valuable insights into the design of efficient NTP-adapted catalysts for oxidation reactions.

低温下晶格氧（Olatt）的有效活化一直是催化氧化反应中的难题。传统的热催化烟尘燃烧，即使使用Pt/Pd催化剂，在排气温度低于200°C时效率也很低，特别是在频繁空转的情况下。在此，我们报告了一种有效的策略，利用非热等离子体（NTP）激活Ce1-xCoxO2 -δ催化剂中的Olatt，在低温下显著提高烟灰燃烧速率。在200°C和4.3 W（放电功率，pdi）下，NTP-Ce0.8Co0.2O2 -δ的烟尘转化率为96.9%，CO2选择性为99.0%，最大能量转换效率为14.7 g kWh-1。与之前报道的结果相比，NTP-Ce0.8Co0.2O2 -δ具有最高的S（CO2）和Emax值。值得注意的是，即使没有加热，XC， Emax和S（CO2）在6.3 W （Pdis）时分别达到92.1%，6.1 g kWh-1和97.5%。表征和理论计算结果表明，Co掺杂到CeO2晶格中，形成不对称的Ce-O-Co结构，使氧“来得快去得快”，从而使烟灰在NTP-Ce0.8Co0.2O2 -δ上快速燃烧。这项研究强调了NTP在活化Olatt方面的巨大潜力，并为设计高效的NTP适应氧化反应的催化剂提供了有价值的见解。

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引用次数: 0

Integrated design of iridium-based catalysts for proton exchange membrane water electrolyzers 质子交换膜水电解槽用铱基催化剂的集成设计

IF 17.7 1区化学 Q1 CHEMISTRY, APPLIED

Chinese Journal of Catalysis

Pub Date : 2025-09-15 DOI: 10.1016/S1872-2067(25)64787-5

Jiahao Yang , Zhaoping Shi , Minhua Shao , Meiling Xiao , Changpeng Liu , Wei Xing

Proton exchange membrane water electrolysis (PEMWE) has garnered significant attention as a pivotal technology for converting surplus electricity into hydrogen for long-term storage, as well as for providing high-purity hydrogen for aerospace and high-end manufacturing applications. With the ongoing commercialization of PEMWE, advancing iridium-based oxygen evolution reaction (OER) catalysts remains imperative to reconcile stringent requirements for high activity, extended longevity, and minimized noble metal loading. The review provides a systematic analysis of the integrated design of iridium-based catalysts in PEMWE, starting from the fundamentals of OER, including the operation environment of OER catalysts, catalytic performance evaluation within PEMWE, as well as catalytic and dissolution mechanisms. Subsequently, the catalyst classification and preparation/characterization techniques are summarized with the focus on the dynamic structure-property relationship. Guided by these understandings, an overview of the design strategies for performance enhancement is presented. Specifically, we construct a mathematical framework for cost-performance optimization to offer quantitative guidance for catalyst design. Finally, future perspectives are proposed, aiming to establish a theoretical framework for rational catalyst design.

质子交换膜水电解（PEMWE）作为一项将剩余电力转化为氢气用于长期储存的关键技术，以及为航空航天和高端制造业提供高纯度氢气的关键技术，受到了广泛关注。随着PEMWE的持续商业化，发展基于铱的析氧反应（OER）催化剂仍然是必要的，以满足高活性、延长寿命和最小化贵金属负载的严格要求。本文从OER的基本原理出发，包括OER催化剂的使用环境、在PEMWE内的催化性能评价、催化和溶解机理等方面，系统地分析了PEMWE中铱基催化剂的集成设计。随后，综述了催化剂的分类和制备/表征技术，重点介绍了催化剂的动态构效关系。在这些理解的指导下，对性能增强的设计策略进行了概述。具体而言，我们构建了一个成本-性能优化的数学框架，为催化剂设计提供定量指导。最后，提出了未来的展望，旨在为催化剂的合理设计建立理论框架。

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引用次数: 0

Origin of Brönsted acidity in germanosilicates from neighboring Ge-hydroxyl groups 锗硅酸盐中邻近ge -羟基Brönsted酸性的来源

IF 17.7 1区化学 Q1 CHEMISTRY, APPLIED

Chinese Journal of Catalysis

Pub Date : 2025-09-15 DOI: 10.1016/S1872-2067(25)64762-0

Kun Lu , Qian Liu , Liyu Chen , Jilong Wang , Zhenxuan Yuan , Xiao Kong , Yunxing Bai , Jingang Jiang , Yejun Guan , Sicong Ma , Hao Xu , Weixin Huang , Zhipan Liu , Peng Wu

Constructing new Brönsted acid sites within zeolitic materials holds paramount importance for the advancement of solid-acid catalysis. Zeo-type germanosilicates, a class of metallosilicates with a neutral framework composed of tetravalent Ge and Si oxygen tetrahedrons, are conventionally considered not to generate Brönsted acid sites. Herein, we disclose an abnormal phenomenon with Ge-rich IWW-type germanosilicate (IWW-A) as an example that Ge-enriched germanosilicates are featured by mild Brönsted acidity. Using the art-of-state density functional theory calculation, ¹⁹F magic angle spinning nuclear magnetic resonance, microcalorimetric and ammonia infrared mass spectrometry- temperature-programmed desorption characterizations, the nature of germanosilicate’s Brönsted acidity has been demonstrated to be closely related to the neighboring framework Ge-hydroxyl pairs. Besides, the contribution of Ge-OH groups to Brönsted acidity and the role of Ge-pair structure for maintaining mild acid strength have been elucidated. In catalytic cracking of n-hexane and methanol-to-olefins reaction, the IWW-A germanosilicate exhibit high light olefins selectivity, good recyclability and low carbon deposition, outperforming the benchmark zeolite catalyst, ZSM-5 aluminosilicate.

在沸石材料中构建新的Brönsted酸位对于推进固体酸催化具有至关重要的意义。zeo型锗硅酸盐是一类金属硅酸盐，具有由四价Ge和Si氧四面体组成的中性骨架，通常被认为不会产生Brönsted酸位。本文以富锗锗型锗硅酸盐（IWW-A）为例，揭示了富锗锗硅酸盐具有温和Brönsted酸性的异常现象。利用状态密度泛函理论计算、19F魔角自旋核磁共振、微量热法和氨红外质谱法-程序升温解吸表征，证明了锗硅酸盐Brönsted酸性的性质与邻近的框架ge -羟基对密切相关。此外，还阐明了Ge-OH基团对Brönsted酸性的贡献以及ge对结构对维持温和酸强度的作用。在正己烷和甲醇制烯烃的催化裂化反应中，IWW-A型锗硅酸盐表现出高的轻质烯烃选择性、良好的可回收性和低碳沉积，优于ZSM-5型沸石催化剂。

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引用次数: 0

Remote hydrogen-spillover effect on catalytic transnitrilation for biomass-based nitrile synthesis 远距离氢溢出效应对生物质基腈合成催化透硝化的影响

IF 17.7 1区化学 Q1 CHEMISTRY, APPLIED

Chinese Journal of Catalysis

Pub Date : 2025-09-15 DOI: 10.1016/S1872-2067(25)64782-6

Guipeng Zhang, Yan Bin, Yanxin Wang, Jinzhu Chen

Acid-nitrile exchange reaction (transnitrilation) is a state-of-the-art strategy for nitrile synthesis with a promising industrial application. Herein, a dedicated catalytic system for transnitrilation was designed based on remote H-spillover effect by physically mixing Pt nanoparticles-encapsulated in hollow ZSM-5 (Pt@ZSM-5) and Ni-doped Nb₂O₅ (Ni/Nb₂O₅) under 10%-H₂/N₂. The Pt@ZSM-5 acts as a primary active-center for H₂-dissociation over Pt to form H-spillover; while, Ni/Nb₂O₅ serves as an acceptor-site of H-spillover. Upon uptake of the H-spillover, the doped-reversible Ni²⁺/Ni⁺ couples in the Ni/Nb₂O₅ significantly facilitate migrations of proton (Brönsted-acid site) and surface vacancy (Lewis-acid site) throughout its surface, thus enhancing and enriching its surface-acidic sites for the catalytic transnitrilation. Kinetic analysis demonstrates nitrile-activation over Lewis-acid site of Ni/Nb₂O₅ as rate-determining step of the transnitrilation. This research provides a molecular-scale and fundamental understanding of remote H-spillover effect on a solid acid for an improved catalytic performance by in-situ regulation on its surface-acid type and strength.

酸腈交换反应（transnitrilation）是一种最先进的腈合成方法，具有很好的工业应用前景。本文基于远程h溢出效应，在10%-H2/N2条件下，将包裹在空心ZSM-5 （Pt@ZSM-5）内的Pt纳米粒子与Ni掺杂的Nb2O5 （Ni/Nb2O5）物理混合，设计了一个专用的透硝化催化体系。Pt@ZSM-5是Pt上h2离解形成h溢出的主要活性中心；而Ni/Nb2O5作为h溢出的受体位点。在吸收h -溢出后，Ni/Nb2O5中掺杂的可逆Ni2+/Ni+对显著促进了质子（Brönsted-acid位点）和表面空位（lewis -酸位点）在其表面的迁移，从而增强和丰富了其表面酸性位点，用于催化透硝化。动力学分析表明，Ni/Nb2O5的lewis酸位点上的腈活化是透硝化反应的速率决定步骤。本研究为通过原位调节固体酸的表面酸类型和强度来提高催化性能提供了分子尺度和对固体酸远程h溢出效应的基本理解。

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引用次数: 0

Ultrathin two-dimensional electrocatalysts: Structure-property relationships, mechanistic insights, and applications in water electrolysis 超薄二维电催化剂：结构-性质关系，机理见解，以及在水电解中的应用

IF 17.7 1区化学 Q1 CHEMISTRY, APPLIED

Chinese Journal of Catalysis

Pub Date : 2025-09-15 DOI: 10.1016/S1872-2067(25)64783-8

Lina Wang , Muhan Na , Ruofei Du , Xiujin Wang , Boyang Yu , Lan Yang , Hui Chen , Xiaoxin Zou

The pursuit of sustainable hydrogen production has positioned water electrolysis as a cornerstone technology for global carbon neutrality. However, sluggish kinetics, catalyst scarcity, and system integration challenges hinder its widespread deployment. Ultrathin two-dimensional (2D) materials, with their atomically exposed surfaces, tunable electronic structures, and defect-engineering capabilities, present unique opportunities for next-generation electrocatalysts. This review provides an integrated overview of ultrathin 2D electrocatalysts, discussing their structural diversity, synthetic routes, structure-activity relationships, and mechanistic understanding in water electrolysis processes. Special focus is placed on the translation of 2D materials from laboratory research to practical device implementation, emphasizing challenges such as scalable fabrication, interfacial engineering, and operational durability in realistic electrolyzer environments. The role of advanced characterization techniques in capturing dynamic structural changes and active site evolution is discussed. Finally, we outline future research directions, emphasizing the synergy of machine learning-driven materials discovery, advanced operando characterization, and scalable system integration to accelerate the industrial translation of 2D electrocatalysts for green hydrogen production.

对可持续制氢的追求使水电解成为全球碳中和的基石技术。然而，缓慢的动力学、催化剂稀缺和系统集成挑战阻碍了其广泛应用。超薄二维（2D）材料具有原子暴露的表面、可调谐的电子结构和缺陷工程能力，为下一代电催化剂提供了独特的机会。本文综述了超薄二维电催化剂的研究进展，讨论了其结构多样性、合成路线、构效关系以及在水电解过程中的机理。特别关注2D材料从实验室研究到实际设备实施的转化，强调诸如可扩展制造，界面工程和实际电解槽环境中的操作耐久性等挑战。讨论了先进的表征技术在捕获动态结构变化和活性位点演变中的作用。最后，我们概述了未来的研究方向，强调机器学习驱动的材料发现，先进的operando表征和可扩展的系统集成的协同作用，以加速二维电催化剂的工业转化，用于绿色制氢。

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引用次数: 0

The strong Pt-N3O coordination in graphene nanosheets accelerates the 4e− electrocatalytic oxygen reduction process 石墨烯纳米片中pt - n30o的强配位加速了4e−电催化氧还原过程

IF 17.7 1区化学 Q1 CHEMISTRY, APPLIED

Chinese Journal of Catalysis

Pub Date : 2025-09-15 DOI: 10.1016/S1872-2067(25)64768-1

Xinqi Wang , Xueyuan Zhang , Menggai Jiao , Runlin Ma , Fang Xie , Hao Wan , Xiangjian Shen , Li-Li Zhang , Wei Ma , Zhen Zhou

Single-metal sites anchored in nitrogen-doped nanocarbons are recognized as potent electrocatalysts for applications in energy conversion and storage. Here, an innovative inorganic salt-mediated secondary calcination strategy was developed to construct robust Pt single-atom catalysts on nitrogen- and oxygen-doped graphene nanosheets (Pt-N/O-GNs), thereby significantly enhancing the efficiency of the electrocatalytic oxygen reduction reaction (ORR). The ultrathin N/O-GNs, obtained by stripping Zn-ZIF with auxiliaries of KCl and LiCl, provide stable anchoring sites for highly exposed Pt-N₃O active structures. The Pt-N/O-GNs catalyst, featuring a low Pt loading of 0.44 wt%, demonstrates exceptional mass activity in the ORR process. It attains an impressive onset potential of 0.99 V and a half-wave potential of 0.88 V. The zinc-air battery driven by the Pt-N/O-GNs displays superior power density and cycle stability. Theoretical computational studies reveal that the structure of heteroatoms doped in few-layer graphene facilitates the stable anchoring of single-atom configurations. The findings provide new perspectives for the tailored design and fabrication of single-metal-site electrocatalysts.

锚定在氮掺杂纳米碳上的单金属位点被认为是在能量转换和存储应用中有效的电催化剂。本研究开发了一种创新的无机盐介导的二次煅烧策略，在氮和氧掺杂的石墨烯纳米片（Pt- n /O-GNs）上构建坚固的Pt单原子催化剂，从而显著提高了电催化氧还原反应（ORR）的效率。以KCl和LiCl为助剂剥离Zn-ZIF得到超薄N/O-GNs，为高暴露pt - n30活性结构提供稳定的锚定位点。Pt- n /O-GNs催化剂具有0.44 wt%的低Pt负载，在ORR过程中表现出优异的质量活性。它达到了令人印象深刻的0.99 V的起始电位和0.88 V的半波电位。由Pt-N/O-GNs驱动的锌空气电池具有优异的功率密度和循环稳定性。理论计算研究表明，杂原子掺杂在少层石墨烯中的结构有利于单原子构型的稳定锚定。这一发现为单金属电催化剂的定制设计和制造提供了新的视角。

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引用次数: 0