Metal-organic framework derived CoSe2 nanoparticles anchored on carbon fibers as bifunctional electrocatalysts for efficient overall water splitting
Metal-organic framework derived CoSe2 nanoparticles anchored on carbon fibers as bifunctional electrocatalysts for efficient overall water splitting
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金属有机骨架衍生的 CoSe2 纳米粒子锚定在碳纤维上作为双功能电催化剂，用于有效的整体水分解
DOI：
10.1007/s12274-016-1110-1
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发表时间：
2016-08-01
期刊：
影响因子：
9.9
通讯作者：
Dong, Xiaochen
中科院分区：
文献类型：
--
作者：
Sun, Chencheng;Dong, Qiuchun;Dong, Xiaochen
开发高效、低成本、稳定的非贵金属水裂解电催化剂，特别是那些既能催化阴极析氢反应（HER）又能催化阳极析氧反应（OER）的催化剂，是一项挑战。我们开发了一种简便的方法，通过原位生长的沸石咪唑骨架-67（ZIF-67）的热解和硒化来合成均匀锚定在碳纤维纸（CoSe 2/CF）上的CoSe 2纳米颗粒。CoSe 2/CF在碱性条件下对HER和OER均表现出较高的催化活性。在低电池电位下，即，1.63 V，配备有两个CoSe 2/CF电极的水电解槽给出10 mA中心点cm（-2）的水裂解电流。在20 mA中心点cm（-2）电流下，可连续工作30 h而不发生退化。该研究不仅为水裂解提供了一种具有成本效益的解决方案，而且为通过改变金属有机骨架前体开发各种催化纳米结构提供了一种新的策略。
The development of efficient, low-cost, stable, non-noble-metal electrocatalysts for water splitting, particularly those that can catalyze both the hydrogen evolution reaction (HER) at the cathode and oxygen evolution reaction (OER) at the anode, is a challenge. We have developed a facile method for synthesizing CoSe2 nanoparticles uniformly anchored on carbon fiber paper (CoSe2/CF) via pyrolysis and selenization of in situ grown zeolitic imidazolate framework-67 (ZIF-67). CoSe2/CF shows high and stable catalytic activity in both the HER and OER in alkaline solution. At a low cell potential, i.e., 1.63 V, a water electrolyzer equipped with two CoSe2/CF electrodes gave a water-splitting current of 10 mA center dot cm(-2). At a current of 20 mA center dot cm(-2), it can operate without degradation for 30 h. This study not only offers a cost-effective solution for water splitting but also provides a new strategy for developing various catalytic nanostructures by changing the metal-organic framework precursors.