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Crystal‐Plane‐Dependent Activity of Spinel Co3O4 Towards Water Splitting and the Oxygen Reduction Reaction
ChemElectroChem ( IF 3.5 ) Pub Date : 2018-02-07 , DOI: 10.1002/celc.201701302 Qianfeng Liu 1, 2 , Zhiping Chen 1, 2 , Zhao Yan 1 , Yao Wang 1, 2 , Erdong Wang 1 , Sheng Wang 1 , Shudong Wang 1 , Gongquan Sun 1
ChemElectroChem ( IF 3.5 ) Pub Date : 2018-02-07 , DOI: 10.1002/celc.201701302 Qianfeng Liu 1, 2 , Zhiping Chen 1, 2 , Zhao Yan 1 , Yao Wang 1, 2 , Erdong Wang 1 , Sheng Wang 1 , Shudong Wang 1 , Gongquan Sun 1
Affiliation
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Insights into the relationship between the crystal planes of metal oxides and the catalytic activity of the oxygen evolution reaction (OER), oxygen reduction reaction (ORR), and hydrogen evolution reaction (HER) are essential for developing efficient renewable energy technologies. Herein, spinel Co3O4 nanomaterials were synthesized controllably with the specified morphologies of nanocubes, nanosheets, and nanoplates with different exposed planes of {100}, {110}, and {111}, respectively. The effects of the crystal planes of Co3O4 on the activity for the OER, ORR, and HER were subsequently investigated in alkaline media. Different electrocatalytic performances are possibly attributed to the abundance ratios of Co3+/Co2+ over the different exposed planes. The surface Co3+ ions exhibit higher activity for the OER and HER, whereas the surface Co2+ ions exhibit better performance for the ORR; moreover, higher electroconductivity enhances the polarization current for ORR and HER except OER.
中文翻译：
尖晶石Co3O4对水分解和氧还原反应的晶体平面依赖性活性
洞察金属氧化物的晶面与氧释放反应（OER），氧还原反应（ORR）和氢释放反应（HER）的催化活性之间的关系对于开发有效的可再生能源技术至关重要。在这里，尖晶石Co 3 O 4纳米材料是可控制地合成的，具有分别具有{100}，{110}和{111}的不同暴露平面的纳米立方体，纳米片和纳米板的特定形态。随后在碱性介质中研究了Co 3 O 4晶面对OER，ORR和HER活性的影响。不同的电催化性能可能归因于Co 3+的丰度比/ Co 2+在不同的暴露平面上。表面Co 3+离子对OER和HER表现出较高的活性，而表面Co 2+离子对ORR表现出更好的性能。此外，较高的电导率会提高除OER以外的ORR和HER的极化电流。
更新日期：2018-02-07
中文翻译：
尖晶石Co3O4对水分解和氧还原反应的晶体平面依赖性活性
洞察金属氧化物的晶面与氧释放反应（OER），氧还原反应（ORR）和氢释放反应（HER）的催化活性之间的关系对于开发有效的可再生能源技术至关重要。在这里，尖晶石Co 3 O 4纳米材料是可控制地合成的，具有分别具有{100}，{110}和{111}的不同暴露平面的纳米立方体，纳米片和纳米板的特定形态。随后在碱性介质中研究了Co 3 O 4晶面对OER，ORR和HER活性的影响。不同的电催化性能可能归因于Co 3+的丰度比/ Co 2+在不同的暴露平面上。表面Co 3+离子对OER和HER表现出较高的活性，而表面Co 2+离子对ORR表现出更好的性能。此外，较高的电导率会提高除OER以外的ORR和HER的极化电流。
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