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Metal-Free Catalyst with Large Carbon Defects for Efficient Direct Overall Water Splitting in Air at Room Pressure.
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-06-05 , DOI: 10.1021/acsami.0c02544 Qingyao Wu 1 , Mengmeng Zhu 1 , Jingjing Cao 1 , Xiao Wang 1 , Yang Liu 1 , Chensheng Xiang 2 , Mingwang Shao 1 , He Tian 2 , Zhenhui Kang 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-06-05 , DOI: 10.1021/acsami.0c02544 Qingyao Wu 1 , Mengmeng Zhu 1 , Jingjing Cao 1 , Xiao Wang 1 , Yang Liu 1 , Chensheng Xiang 2 , Mingwang Shao 1 , He Tian 2 , Zhenhui Kang 1
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Hydrogen can be used as a conventional clean energy resource, only by obtaining it in a cheap, simple, and feasible way. From the perspective of solar energy utilization, photocatalytic water splitting is essentially limited by high electric energy and intermittent solar energy. Here, we demonstrate that the carbon defects could decompose water directly by using low-value mechanical energy in the daily environment without using the sacrificial agent. The prepared metal-free carbon catalyst (OPC-900) with rich graphene topological defects shows several redox states in acetonitrile, which can accumulate redox equivalents and respond for overall water splitting in air at room pressure. Under stirring or light conditions, charges can be created and accumulated on the catalyst surface and split water into H2 and O2 in low conductivity medium. The mechanical energy conversion efficiency of stirring in ultrapure water is 7.01%. Our work combines visible light with low-value mechanical energy for widespread decomposition of water to produce hydrogen in air under normal pressure.
中文翻译：
具有大碳缺陷的无金属催化剂，可在室温下在空气中进行有效的直接总水分解。
氢只能通过廉价，简单和可行的方式获得，才能用作常规的清洁能源。从太阳能利用的角度来看，光催化水分解基本上受到高电能和间歇太阳能的限制。在这里，我们证明碳缺陷可以通过在日常环境中使用低值机械能而不使用牺牲剂直接分解水。制备的具有丰富石墨烯拓扑缺陷的无金属碳催化剂（OPC-900）在乙腈中表现出几种氧化还原状态，可以积累氧化还原当量并响应室温下空气中的总水分解。在搅拌或光照条件下，会产生电荷并将其累积在催化剂表面，并将水分解为H 2和O2在低电导率的介质中。在超纯水中搅拌的机械能转化效率为7.01％。我们的工作将可见光与低价值的机械能结合在一起，使水在常压下广泛分解以产生氢气。
更新日期：2020-07-08
中文翻译：
具有大碳缺陷的无金属催化剂，可在室温下在空气中进行有效的直接总水分解。
氢只能通过廉价，简单和可行的方式获得，才能用作常规的清洁能源。从太阳能利用的角度来看，光催化水分解基本上受到高电能和间歇太阳能的限制。在这里，我们证明碳缺陷可以通过在日常环境中使用低值机械能而不使用牺牲剂直接分解水。制备的具有丰富石墨烯拓扑缺陷的无金属碳催化剂（OPC-900）在乙腈中表现出几种氧化还原状态，可以积累氧化还原当量并响应室温下空气中的总水分解。在搅拌或光照条件下，会产生电荷并将其累积在催化剂表面，并将水分解为H 2和O2在低电导率的介质中。在超纯水中搅拌的机械能转化效率为7.01％。我们的工作将可见光与低价值的机械能结合在一起，使水在常压下广泛分解以产生氢气。
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