Structurally Engineered Hyperbranched NiCoP Arrays with Superior Electrocatalytic Activities toward Highly Efficient Overall Water Splitting
Structurally Engineered Hyperbranched NiCoP Arrays with Superior Electrocatalytic Activities toward Highly Efficient Overall Water Splitting
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结构设计的超支化 NiCoP 阵列具有卓越的电催化活性，可实现高效的整体水分解
DOI：
10.1021/acsami.8b11576
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发表时间：
2018
影响因子：
9.5
通讯作者：
Wei Bingqing
中科院分区：
文献类型：
--
作者：
Wang Jian-Gan;Hua Wei;Li Mingyu;Liu Huanyan;Shao Minhua;Wei Bingqing
开发廉价的具有高电催化活性的过渡金属基纳米材料对于电化学水裂解具有重要意义。在这项研究中，我们提出了一个可控的结构工程策略，构建一个超支化的架构，高效的析氢/析氧反应（HER/OER）。超支化NiCoP架构组织的分层纳米棒纳米片阵列的合理准备作为示范通过一个简单的溶剂热和磷化的方法。实现了来自多尺度构建块的强协同效益，以在碱性电解槽中实现出色的电催化性能，包括在10 mA cm-2下分别为71和268 mV的低HER和OER过电位，这显著优于单独纳米棒和纳米片的对应物。双功能催化剂还显示出高效和耐用的整体水电催化，具有1.57 V的小电压以驱动10 mA cm-2的电流密度。本研究将打开一个新的窗口，工程超支化结构具有特殊的电催化活性，对整体水裂解。
Developing inexpensive transition-metal-based nanomaterials with high electrocatalytic activity is of significant necessity for electrochemical water splitting. In this study, we propose a controllable structural engineering strategy of constructing a hyperbranched architecture for highly efficient hydrogen evolution reaction/oxygen evolution reaction (HER/OER). Hyperbranched NiCoP architecture organized by hierarchical nanorod-on-nanosheet arrays is rationally prepared as a demonstration via a facile solvothermal and phosphorization approach. A strong synergistic benefit from the multiscale building blocks is achieved to enable outstanding electrocatalytic properties in an alkaline electrolyzer, including low HER and OER overpotentials of 71 and 268 mV at 10 mA cm–2, respectively, which significantly outperforms the counterparts of individual nanorods and nanosheets. The bifunctional catalysts also show highly efficient and durable overall water electrocatalysis with a small voltage of 1.57 V to drive a current density of 10 mA cm–2. The present study will open a new window to engineering hyperbranched architectures with exceptional electrocatalytic activities toward overall water splitting.