NC/Ni–Co3O4@Co1−xS Nanosheet Prepared from Metal Organic Framework for Highly Efficient Overall Water Splitting
NC/Ni–Co3O4@Co1−xS Nanosheet Prepared from Metal Organic Framework for Highly Efficient Overall Water Splitting
复制标题
由金属有机框架制备的 NC/Ni·Co3O4@Co1·xS 纳米片，用于高效整体水分解
DOI：
10.1007/s10562-022-04014-2
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发表时间：
2022
影响因子：
2.8
通讯作者：
Qiang Zhao
中科院分区：
文献类型：
--
作者：
Guangkai Guo;Dazhong Zhong;Tao Zhao;Guang Liu;Jinping Li;Qiang Zhao
开发活性、稳定且经济的电催化剂对于高效的整体水裂解是重要的。金属有机骨架被认为是合成全水裂解催化剂的有效前体。本文从ZIF-67中获得了小尺寸的NC/Ni-Co 3 O 4 @ Co 1 −xS。NC/Ni-Co 3 O 4 @ Co 1 −xS材料表现出上级的整体水分解性能，在10 mA cm − 2下析氢反应的过电位为170 mV，在10 mA cm− 2下析氧反应的过电位为210 mV，并且具有长期稳定性。此外，当NC/Ni-Co 3 O 4 @ Co 1 −xS用作阳极和阴极时，整个水裂解仅需要1.64 V来驱动10 mA cm−2的电流密度。NC/Ni-Co 3 O 4 @ Co 1 −xS具有良好的电催化活性，这是由于其纳米片结构，大大增加了电化学活性表面积，并且NC/Ni-Co 3 O 4 @ Co 1 −xS具有良好的导电性和丰富的Co 3+位，因此电催化活性显著增强。该研究为新型复合电催化剂的设计和合成提供了新的思路。
It is important to develop active, stable, and cost-effective electrocatalysts for highly efficient overall water splitting. Metal organic frameworks were considered as efficient precursors for overall water splitting catalysts. In this paper, NC/Ni–Co3O4@Co1−xS with small size is obtained from ZIF-67. NC/Ni–Co3O4@Co1−xS materials exhibit superior overall water splitting properties, with a low overpotential of 170 mV for the hydrogen evolution reaction at 10 mA cm−2and 210 mV for the oxygen evolution reaction at 10 mA cm−2and long-term stability. Furthermore, the overall water splitting only requires 1.64 V to drive the current density of 10 mA cm−2, when the NC/ Ni–Co3O4@Co1−xS are used as both anode and cathode. NC/Ni–Co3O4@Co1−xS has excellent electrocatalytic activity due to its nanosheet structure, which greatly increases the electrochemically active surface area and the NC/Ni–Co3O4@Co1−xS has good electrical conductivity and abundant Co3+sites, so the electrocatalytic activity is significantly enhanced. This study provides a new idea for the design and synthesis of novel composite electrocatalysts.Graphical Abstract