Self-Supported Cobalt Phosphide Mesoporous Nanorod Arrays: A Flexible and Bifunctional Electrode for Highly Active Electrocatalytic Water Reduction and Oxidation
Self-Supported Cobalt Phosphide Mesoporous Nanorod Arrays: A Flexible and Bifunctional Electrode for Highly Active Electrocatalytic Water Reduction and Oxidation
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自支撑磷化钴介孔纳米棒阵列：一种用于高活性电催化水还原和氧化的柔性双功能电极
DOI：
10.1002/adfm.201503666
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发表时间：
2015-12-16
影响因子：
19
通讯作者：
Yuan, Zhong-Yong
中科院分区：
文献类型：
--
作者：
Zhu, Yun-Pei;Liu, Yu-Ping;Yuan, Zhong-Yong
水裂解生产氢气和氧气是推动许多可持续和可再生能源转换和储存系统的一个有吸引力的解决方案，而关键事实取决于有关高效电催化剂设计的创新探索。本文报道了通过电沉积策略在导电镍泡沫上生长CoP介孔纳米棒阵列。所得到的具有良好限定的中孔性和高比表面积（148 m2 g-1）的材料可以直接用作用于析氢和析氧反应的双功能和柔性工作电极，与贵金属基准和最先进的过渡金属基催化剂相比，显示出上级活性。这与独特的纳米棒阵列电极配置密切相关，导致优异的电互连和改善的质量传输。进一步的步骤是朝着碱性电解槽，可以实现10 mA cm（-2）的电流密度在1.62 V左右的电压在长期运行，优于Pt和IrO 2的组合。这一发展建议很容易扩展到获得其他电催化系统的规模化水裂解技术。
Water splitting for the production of hydrogen and oxygen is an appealing solution to advance many sustainable and renewable energy conversion and storage systems, while the key fact depends on the innovative exploration regarding the design of efficient electrocatalysts. Reported herein is the growth of CoP mesoporous nanorod arrays on conductive Ni foam through an electrodeposition strategy. The resulting material of well-defined mesoporosity and a high specific surface area (148 m(2) g(-1)) can be directly employed as a bifunctional and flexible working electrode for both hydrogen and oxygen evolution reactions, showing superior activities as compared with noble metal benchmarks and state-of-the-art transition-metal-based catalysts. This is intimately related to the unique nanorod array electrode configuration, leading to excellent electric interconnection and improved mass transport. A further step is taken toward an alkaline electrolyzer that can achieve a current density of 10 mA cm(-2) at a voltage around 1.62 V over a long-term operation, better than the combination of Pt and IrO2. This development is suggested to be readily extended to obtain other electrocatalysis systems for scale-up water-splitting technology.