Metal-organic framework derived CoSe2 nanoparticles anchored on carbon fibers as bifunctional electrocatalysts for efficient overall water splitting  

作　　者：Chencheng Sun Qiuchun Dong Jun Yang Ziyang Dai Jianjian Lin Peng Chen Wei Huang Xiaochen Dong 

机构地区：[1]Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanfingTech), 30 South Puzhu Road, Nanjing 211816, China [2]School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, 637459 Singapore, Singapore

出　　处：《Nano Research》2016年第8期2234-2243,共10页纳米研究（英文版）

基　　金：The project is supported by the National Natural Science Foundation of China （Nos. 21275076 and 61328401）, Jiangsu Provincial Founds for Distinguished Young Scholars （No. BK20130046）, Key University Science Research Project of Jiangsu Province （No. 15KJA430006）, Program for New Century Excellent Talents in University （No. NCET-13-0853）, QingLan Project, Nantong Key Laboratory of New Materials Industrial Technology, SERC Grant （#102170 0142） from A＇STAR Singapore, the scholarship from China Scholarships Council （No. 201508320304）.

摘　　要：The development of efficient, low-cost, for water splitting, particularly those stable, non-noble-metal electrocatalysts 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.cm-2. At a current of 20 mA-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.The development of efficient, low-cost, for water splitting, particularly those stable, non-noble-metal electrocatalysts 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.cm-2. At a current of 20 mA-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.

关 键 词：metal-organic framework cobalt selenide ELECTROCATALYST overall water splitting 

分 类 号：O[理学]