Constructing bimetal-complex based hydrogen-bonded framework for highly efficient electrocatalytic water splitting
Constructing bimetal-complex based hydrogen-bonded framework for highly efficient electrocatalytic water splitting
复制标题
构建基于双金属配合物的氢键框架以实现高效电催化水分解
DOI：
10.1016/j.apcatb.2019.117973
复制
发表时间：
2019-12-05
影响因子：
22.1
通讯作者：
Luo, Feng
中科院分区：
文献类型：
--
作者：
Liu, Feng Qing;Liu, Jian Wen;Luo, Feng
本文提出了一种新的氢键有机骨架(HOF)材料，用于整体水分解的高效电催化。这种HOF材料，即HOF-Co，是基于非常便宜的原材料合成的。结晶HOF-CoxFe1-x的双金属HOF。此外，还可以通过逐步方法轻松地获得泡沫镍(NF)上的化学成分。在1MKOH中，NF上的HOF-Co0.5Fe0.5同时具有优异的析氧反应(OER)和析氢反应(HER)性能，从而在10 mA cm(-2)下以1.63V的电池电压高效地催化分解水。该VALUE可与商用的铂/C//IrO2(1.59V)和其他公认的优秀电催化剂相媲美。密度泛函理论(DFT)计算表明，这一机理是由于配位水分子和SO42-离子之间丰富的氢键结构所产生的显著协同效应，该结构提供了丰富和可访问的活性中心，并结合了双金属效应。
We present herein a new concept of hydrogen-bonded organic framework (HOF) material for highly effective electrocatalysis of overall water splitting. This HOF material, namely HOF-Co, was synthesized based on very cheap raw materials. Crystallizing bimetallic HOFs of HOF-CoxFe1-x. on nickel foam (NF) can be also easily obtained via a step-by-step approach. In 1 M KOH, HOF-Co0.5Fe0.5 on the NF enables both excellent oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) performance, thus leading to highly effective electrocatalysis of water splitting with a cell voltage of just 1.63 V at 10 mA cm(-2). The vaule is comparable to the commercial Pt/C//IrO2 (1.59 V) and other established outstanding electrocatalysts. The mechanism, as evidenced by Density Functional Theory (DFT) calculations, is due to a significant synergistic effect from the abundant hydrogen-bond structure between coordinated water molecules and SO42- ions that affords rich and accessible active sites, in conjunction with the bimetallic effect.