Ultrathin bismuth nanosheets from in situ topotactic transformation for selective electrocatalytic CO(2) reduction to formate.
Ultrathin bismuth nanosheets from in situ topotactic transformation for selective electrocatalytic CO(2) reduction to formate.
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DOI：
10.1038/s41467-018-03712-z
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发表时间：
2018-04-03
影响因子：
16.6
通讯作者：
Li Y
中科院分区：
文献类型：
--
作者：
Han N;Wang Y;Yang H;Deng J;Wu J;Li Y;Li Y
电催化二氧化碳还原为甲酸盐是期望的，但具有挑战性。目前的注意力主要集中在锡基材料上，不幸的是，锡基材料经常受到有限的法拉第效率的影响。铋在减少二氧化碳方面的潜力已经被提出，但仍然研究不足。在这里，我们报道了碘氧化铋纳米片的原位拓扑异构转化制备的铋纳米片。它们处理单一结晶性和扩大的表面积。这种有利的纳米结构为材料提供了用于将二氧化碳还原为甲酸盐的优异的电催化性能。高选择性（~100%）和大电流密度在宽电位下测量，以及>10 h的优异耐久性。它对甲酸的选择性也被密度泛函理论计算所理解。此外，铋纳米片与铱基析氧电催化剂结合，以实现有效的全电池电解。当由两个AA大小的碱性电池供电时，全电池表现出令人印象深刻的法拉第效率和电力到甲酸盐的转换效率。将二氧化碳电还原为液体产物提供了一种将大气中的碳转化为有价值的燃料的有吸引力的方法。在这里，作者进行了碘氧化铋的拓扑异构转化为铋纳米片，作为高度选择性的CO2-甲酸盐电催化剂。
Electrocatalytic carbon dioxide reduction to formate is desirable but challenging. Current attention is mostly focused on tin-based materials, which, unfortunately, often suffer from limited Faradaic efficiency. The potential of bismuth in carbon dioxide reduction has been suggested but remained understudied. Here, we report that ultrathin bismuth nanosheets are prepared from the in situ topotactic transformation of bismuth oxyiodide nanosheets. They process single crystallinity and enlarged surface areas. Such an advantageous nanostructure affords the material with excellent electrocatalytic performance for carbon dioxide reduction to formate. High selectivity (~100%) and large current density are measured over a broad potential, as well as excellent durability for >10 h. Its selectivity for formate is also understood by density functional theory calculations. In addition, bismuth nanosheets were coupled with an iridium-based oxygen evolution electrocatalyst to achieve efficient full-cell electrolysis. When powered by two AA-size alkaline batteries, the full cell exhibits impressive Faradaic efficiency and electricity-to-formate conversion efficiency. The electroreduction of carbon dioxide to liquid products provides an appealing method to convert atmospheric carbon into valuable fuels. Here, the authors perform a topotactic transformation of bismuth oxyiodide to bismuth nanosheets that act as highly selective CO2-to-formate electrocatalysts.
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影响因子：
16.6
作者：
Mistry H;Varela AS;Bonifacio CS;Zegkinoglou I;Sinev I;Choi YW;Kisslinger K;Stach EA;Yang JC;Strasser P;Cuenya BR
通讯作者：
Cuenya BR
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作者：
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通讯作者：
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作者：
Jiao, Yan;Zheng, Yao;Qiao, Shi-Zhang
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影响因子：
17.6
作者：
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通讯作者：
Lee, Jong-Lam
影响因子：
16.6
作者：
Lei, Fengcai;Liu, Wei;Sun, Yongfu;Xu, Jiaqi;Liu, Katong;Liang, Liang;Yao, Tao;Pan, Bicai;Wei, Shiqiang;Xie, Yi
通讯作者：
Xie, Yi