苏铁叶状结晶-非晶异质结构用于高效尿素氧化助水分解，这一成果由广西大学Shibin Yin小组经过不懈努力而取得。2024年4月7日出版的《结构化学》杂志发表了这一最新研究成果。

该文首次报道了一种由NiCo合金在泡沫镍上负载的晶体-非晶异质结构催化剂NiCoO-MoOx/NC。通过简单的钼盐蚀刻，二维NiCo合金纳米片被转化为具有超亲水性表面的独特的三维苏铁叶状结构。同时，结晶NiCoO和非晶MoOx之间的协同效应提高了UOR和HER活性，仅分别需要1.28 V和- 45 mV电位就可以达到±10 mA cm^-2。

特别的是，NiCoO-MoOx/NC的UOR动力学比NiCoO/NC明显增强。通过MoOx修饰NiCoO的电子结构，使NiOOH和CoOOH活性物质快速生成，从而加速尿素分子的协同电催化氧化。本研究启发了高效稳定的双功能尿素辅助制氢催化剂的设计。

据研究人员介绍，开发高效的尿素氧化反应/析氢反应双功能催化剂，对节能制氢具有重要意义。

附：英文原文

Title: Cycad-leaf-like crystalline-amorphous heterostructures for efficient urea oxidation-assisted water splitting

Author: anonymous

Issue&Volume: 2024-04-07

Abstract: Developing efficient bifunctional catalysts for urea oxidation reaction (UOR)/hydrogen evolution reaction (HER) is important for energy-saving hydrogen production. Herein, a catalyst with crystalline-amorphous heterostructure supported by NiCo alloy on nickel foam (NiCoO-MoOx/NC) is reported for the first time. Through simple molybdenum salt etching, 2D NiCo alloy nanosheets are transformed into a unique 3D cycad-leaf-like structure with a super-hydrophilic surface. Simultaneously, the synergistic effect between crystalline NiCoO and amorphous MoOx improves the UOR and HER activity, merely requiring 1.28 V and 45 mV potentials to reach ±10 mA cm2, respectively. Particularly, the UOR kinetics of NiCoO-MoOx/NC is enhanced significantly than that of NiCoO/NC. The electronic structure of NiCoO is modified by MoOx, enabling the rapid generation of NiOOH and CoOOH active species, which would accelerate the synergistic electrocatalytic oxidation of urea molecules. This work inspires the designing of highly active and -stable bifunctional catalysts for urea assisted H2 production.

DOI: 10.1016/j.cjsc.2024.100290

Source: http://cjsc.ac.cn/cms/issues/593