Pei Xiaoyu, Yi Shengping, Zhao Yunfeng, Mu Yang, Yu Yuting, Cui Miao, Meng Changgong, Huang Chi, Zhang Yifu
State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China.
College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China.
J Colloid Interface Sci. 2022 Jun 15;616:476-487. doi: 10.1016/j.jcis.2022.02.078. Epub 2022 Feb 22.
The development of robust, low-cost and efficient oxygen evolution reaction (OER) electrocatalysts, especially non-noble-metal-based OER catalysts, is of great significance and imperative to address the energy crisis, but remain challenging. Herein, a biomass-derived three-dimensional (3D) porous carbon/cobalt silicate (C/CoSiO) architecture is developed as a support for loading nickel oxide (NiO) species to prepare an earth-abundant and non-noble-metal-based NiO/C/CoSiO electrocatalyst. The NiO nanoparticles are dispersed on 3D C/CoSiO support and the introduction of NiO species improves the OER active sites and shows the bimetal (Co, Ni) synergetic effect. The NiO/C/CoSiO electrocatalyst exhibits the overpotential with 355 mV at 10 mA cm, Tafel slope with 40 mV dec and large electrochemical active surface areas (ECSA), which are superior to C/CoSiO support and NiO. The catalytic properties achieved herein are superior or comparable to most transition metal oxides/hydroxides. The findings reveal that the introduction of NiO nanoparticles can greatly boost the OER property of C/CoSiO support. This work not only develops a non-noble-metal-based NiO/C/CoSiO catalyst, but also verifies that the introduction of metal oxide species on biomass-derived 3D C/CoSiO provides a new horizon to explore economical, high-efficient and robust OER catalysts.
开发坚固、低成本且高效的析氧反应（OER）电催化剂，尤其是基于非贵金属的OER催化剂，对于解决能源危机具有重大意义且势在必行，但仍然具有挑战性。在此，一种源自生物质的三维（3D）多孔碳/硅酸钴（C/CoSiO）结构被开发出来，作为负载氧化镍（NiO）物种的载体，以制备一种储量丰富且基于非贵金属的NiO/C/CoSiO电催化剂。NiO纳米颗粒分散在3D C/CoSiO载体上，NiO物种的引入增加了OER活性位点，并展现出双金属（Co，Ni）协同效应。NiO/C/CoSiO电催化剂在10 mA cm时的过电位为355 mV，塔菲尔斜率为40 mV dec，且具有较大的电化学活性表面积（ECSA），这些性能均优于C/CoSiO载体和NiO。本文所实现的催化性能优于或可与大多数过渡金属氧化物/氢氧化物相媲美。研究结果表明，NiO纳米颗粒的引入能够极大地提升C/CoSiO载体的OER性能。这项工作不仅开发出了一种基于非贵金属的NiO/C/CoSiO催化剂，还证实了在源自生物质的3D C/CoSiO上引入金属氧化物物种为探索经济、高效且坚固的OER催化剂提供了新的视角。
