Oxygen evolving atoms

IF 42.8 1区 化学 Q1 CHEMISTRY, PHYSICAL Nature Catalysis Pub Date : 2024-06-26 DOI:10.1038/s41929-024-01186-5
Benjamin Martindale
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氧原子进化
采用既定方法将铂SA和铂纳米粒子(NP)分别沉积到TiO2光阳极上。铂纳米颗粒由金属铂(0)态的铂组成,而 XPS 数据表明,由于电子密度捐献给了 TiO2 支持物,铂 SA 含有轻微氧化态的铂(Ptδ+)。与此相一致的是,二氧化钛中的电荷转移动力学在 Pt SA 的存在下发生了改变,而 Pt NP 则基本不受影响。理论计算还表明,在 Pt SA 上,决定 O* 到 *OOH 步骤速率的活化能较低。这些效应的综合结果是,与 TiO2/Pt NP 和裸 TiO2 相比,TiO2/Pt SA 的 PEC OER 性能提高了 2-3 倍。在碱性介质中,相对于 RHE(可逆氢电极),TiO2/Pt SA 上的光电流密度在 1.23 V 时达到 5.9 mA cm-2。除了所研究的特定模型系统外,本报告还很好地提醒人们,在半导体上应用助催化剂会对影响 PEC 反应的电荷转移特性和化学动力学产生影响。研究结果表明,重新审视以前被认为在特定反应中电催化剂效果不佳的材料的不同形式(如原子分散)是有价值的。
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来源期刊
Nature Catalysis
Nature Catalysis Chemical Engineering-Bioengineering
CiteScore
52.10
自引率
1.10%
发文量
140
期刊介绍: Nature Catalysis serves as a platform for researchers across chemistry and related fields, focusing on homogeneous catalysis, heterogeneous catalysis, and biocatalysts, encompassing both fundamental and applied studies. With a particular emphasis on advancing sustainable industries and processes, the journal provides comprehensive coverage of catalysis research, appealing to scientists, engineers, and researchers in academia and industry. Maintaining the high standards of the Nature brand, Nature Catalysis boasts a dedicated team of professional editors, rigorous peer-review processes, and swift publication times, ensuring editorial independence and quality. The journal publishes work spanning heterogeneous catalysis, homogeneous catalysis, and biocatalysis, covering areas such as catalytic synthesis, mechanisms, characterization, computational studies, nanoparticle catalysis, electrocatalysis, photocatalysis, environmental catalysis, asymmetric catalysis, and various forms of organocatalysis.
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