{"title":"量子约束诱导的金属镍氢氧化电催化剂的抗电氧化作用","authors":"Yuanyuan Zhou, Wei Yuan, Mengting Li, Zhenyang Xie, Xiaoyun Song, Yang Yang, Jian Wang, Li Li, Wei Ding, Wen-Feng Lin, Zidong Wei","doi":"10.1038/s41560-024-01604-9","DOIUrl":null,"url":null,"abstract":"The anion-exchange-membrane fuel cell (AEMFC) is an attractive and cost-effective energy-conversion technology because it can use Earth-abundant and low-cost non-precious metal catalysts. However, non-precious metals used in AEMFCs to catalyse the hydrogen oxidation reaction are prone to self-oxidation, resulting in irreversible failure. Here we show a quantum well-like catalytic structure (QWCS), constructed by atomically confining Ni nanoparticles within a carbon-doped-MoOx/MoOx heterojunction (C-MoOx/MoOx) that can selectively transfer external electrons from the hydrogen oxidation reaction while remaining itself metallic. Electrons of Ni nanoparticles gain a barrier of 1.11 eV provided by the QWCS leading to Ni stability up to 1.2 V versus the reversible hydrogen electrode (VRHE) whereas electrons released from the hydrogen oxidation reaction easily cross the barrier by a gating operation of QWCS upon hydrogen adsorption. The QWCS-catalysed AEMFC achieved a high-power density of 486 mW mgNi−1 and withstood hydrogen starvation operations during shutdown–start cycles, whereas a counterpart AEMFC without QWCS failed in a single cycle. Non-precious metals used at the anode of anion-exchange-membrane fuel cells to catalyse hydrogen oxidation are prone to self-oxidation. Here Zhou and colleagues report that a quantum well-like catalytic structure containing Ni nanoparticles within a C-doped MoOx/MoOx heterojunction can mitigate such degradation by a gating operation.","PeriodicalId":19073,"journal":{"name":"Nature Energy","volume":null,"pages":null},"PeriodicalIF":49.7000,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s41560-024-01604-9.pdf","citationCount":"0","resultStr":"{\"title\":\"Quantum confinement-induced anti-electrooxidation of metallic nickel electrocatalysts for hydrogen oxidation\",\"authors\":\"Yuanyuan Zhou, Wei Yuan, Mengting Li, Zhenyang Xie, Xiaoyun Song, Yang Yang, Jian Wang, Li Li, Wei Ding, Wen-Feng Lin, Zidong Wei\",\"doi\":\"10.1038/s41560-024-01604-9\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The anion-exchange-membrane fuel cell (AEMFC) is an attractive and cost-effective energy-conversion technology because it can use Earth-abundant and low-cost non-precious metal catalysts. However, non-precious metals used in AEMFCs to catalyse the hydrogen oxidation reaction are prone to self-oxidation, resulting in irreversible failure. Here we show a quantum well-like catalytic structure (QWCS), constructed by atomically confining Ni nanoparticles within a carbon-doped-MoOx/MoOx heterojunction (C-MoOx/MoOx) that can selectively transfer external electrons from the hydrogen oxidation reaction while remaining itself metallic. Electrons of Ni nanoparticles gain a barrier of 1.11 eV provided by the QWCS leading to Ni stability up to 1.2 V versus the reversible hydrogen electrode (VRHE) whereas electrons released from the hydrogen oxidation reaction easily cross the barrier by a gating operation of QWCS upon hydrogen adsorption. The QWCS-catalysed AEMFC achieved a high-power density of 486 mW mgNi−1 and withstood hydrogen starvation operations during shutdown–start cycles, whereas a counterpart AEMFC without QWCS failed in a single cycle. Non-precious metals used at the anode of anion-exchange-membrane fuel cells to catalyse hydrogen oxidation are prone to self-oxidation. Here Zhou and colleagues report that a quantum well-like catalytic structure containing Ni nanoparticles within a C-doped MoOx/MoOx heterojunction can mitigate such degradation by a gating operation.\",\"PeriodicalId\":19073,\"journal\":{\"name\":\"Nature Energy\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":49.7000,\"publicationDate\":\"2024-08-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.nature.com/articles/s41560-024-01604-9.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nature Energy\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.nature.com/articles/s41560-024-01604-9\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENERGY & FUELS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nature Energy","FirstCategoryId":"88","ListUrlMain":"https://www.nature.com/articles/s41560-024-01604-9","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENERGY & FUELS","Score":null,"Total":0}
Quantum confinement-induced anti-electrooxidation of metallic nickel electrocatalysts for hydrogen oxidation
The anion-exchange-membrane fuel cell (AEMFC) is an attractive and cost-effective energy-conversion technology because it can use Earth-abundant and low-cost non-precious metal catalysts. However, non-precious metals used in AEMFCs to catalyse the hydrogen oxidation reaction are prone to self-oxidation, resulting in irreversible failure. Here we show a quantum well-like catalytic structure (QWCS), constructed by atomically confining Ni nanoparticles within a carbon-doped-MoOx/MoOx heterojunction (C-MoOx/MoOx) that can selectively transfer external electrons from the hydrogen oxidation reaction while remaining itself metallic. Electrons of Ni nanoparticles gain a barrier of 1.11 eV provided by the QWCS leading to Ni stability up to 1.2 V versus the reversible hydrogen electrode (VRHE) whereas electrons released from the hydrogen oxidation reaction easily cross the barrier by a gating operation of QWCS upon hydrogen adsorption. The QWCS-catalysed AEMFC achieved a high-power density of 486 mW mgNi−1 and withstood hydrogen starvation operations during shutdown–start cycles, whereas a counterpart AEMFC without QWCS failed in a single cycle. Non-precious metals used at the anode of anion-exchange-membrane fuel cells to catalyse hydrogen oxidation are prone to self-oxidation. Here Zhou and colleagues report that a quantum well-like catalytic structure containing Ni nanoparticles within a C-doped MoOx/MoOx heterojunction can mitigate such degradation by a gating operation.
Nature EnergyEnergy-Energy Engineering and Power Technology
CiteScore
75.10
自引率
1.10%
发文量
193
期刊介绍:
Nature Energy is a monthly, online-only journal committed to showcasing the most impactful research on energy, covering everything from its generation and distribution to the societal implications of energy technologies and policies.
With a focus on exploring all facets of the ongoing energy discourse, Nature Energy delves into topics such as energy generation, storage, distribution, management, and the societal impacts of energy technologies and policies. Emphasizing studies that push the boundaries of knowledge and contribute to the development of next-generation solutions, the journal serves as a platform for the exchange of ideas among stakeholders at the forefront of the energy sector.
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