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Efficient MMoO4 (M = Co, Ni) carbon cloth electrodes for water oxidation
Inorganic Chemistry Frontiers ( IF 7 ) Pub Date : 2017-09-07 00:00:00 , DOI: 10.1039/c7qi00435d
Jiangli Meng 1, 2, 3, 4, 5 , Jiaqi Fu 1, 2, 3, 4, 5 , Xiaoxuan Yang 1, 2, 3, 4, 5 , Meijie Wei 1, 2, 3, 4, 5 , Song Liang 6, 7, 8, 9 , Hong-Ying Zang 1, 2, 3, 4, 5 , Huaqiao Tan 1, 2, 3, 4, 5 , Yonghui Wang 1, 2, 3, 4, 5 , Yangguang Li 1, 2, 3, 4, 5
Affiliation  

The development of stable, highly active and cheap electrocatalysts towards the oxygen evolution reaction (OER) has been an ongoing challenge due to practical problems such as slow kinetics and high overpotential. Herein, we utilized a one-pot hydrothermal method to prepare cobalt/nickel molybdate hierarchical microflowers on conductive carbon cloth (MMoO4-CC, M = Co, Ni) as three-dimensional self-supported electrodes for the oxygen evolution reaction. CoMoO4-CC showed better catalytic activity than NiMoO4-CC. Benefiting from the synergistic effect of a large active area, fast charge and mass transport as well as a three-dimensional conducting path, the CoMoO4-CC nanosheet electrode showed a large current density and a relatively low starting potential, delivering 10 mA cm−2 current densities at an overpotential of 290 mV and a Tafel slope of 94 mV dec−1. Furthermore, the CoMoO4-CC nanomaterial shows better electrocatalytic stability than IrO2-CCa, which could be a promising electrocatalyst for large-scale water oxidation.

中文翻译:

用于水氧化的高效MMoO 4(M = Co,Ni)碳布电极

由于诸如慢动力学和高过电势之类的实际问题,向氧气析出反应(OER)开发稳定,高活性和廉价的电催化剂一直是一个持续的挑战。在这里,我们利用一锅水热法,在导电碳布(MMoO 4 -CC ,M = Co,Ni)上作为氧释放反应的三维自支撑电极,制备了钴/钼酸镍分层微花。CoMoO 4 -CC表现出比NiMoO 4 -CC更好的催化活性。受益于大有效面积,快速电荷和质量传输以及三维传导路径的协同效应,CoMoO 4-CC纳米片电极显示出大电流密度和相对较低的启动电势,在290 mV的超电势和94 mV dec -1的Tafel斜率下提供10 mA cm -2的电流密度。此外,CoMoO 4 -CC纳米材料显示出比IrO 2 -CC a更好的电催化稳定性,这可能是大规模水氧化的有前途的电催化剂。
更新日期:2017-11-08
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