Volume 58, Issue 44 pp. 15772-15777
Communication

Scaled-Up Synthesis of Amorphous NiFeMo Oxides and Their Rapid Surface Reconstruction for Superior Oxygen Evolution Catalysis

Dr. Yu Duan

Dr. Yu Duan

Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

These authors contributed equally to this work.

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Dr. Zi-You Yu

Dr. Zi-You Yu

Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

These authors contributed equally to this work.

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Dr. Shao-Jin Hu

Dr. Shao-Jin Hu

Division of Theoretical and Computational Sciences, Hefei National Laboratory for Physical Sciences at Microscale, CAS Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, 230026 China

These authors contributed equally to this work.

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Dr. Xu-Sheng Zheng

Dr. Xu-Sheng Zheng

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 China

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Chu-Tian Zhang

Chu-Tian Zhang

Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

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Dr. Hong-He Ding

Dr. Hong-He Ding

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 China

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Dr. Bi-Cheng Hu

Dr. Bi-Cheng Hu

Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

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Dr. Qi-Qi Fu

Dr. Qi-Qi Fu

Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

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Dr. Zhi-Long Yu

Dr. Zhi-Long Yu

Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

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Prof. Xiao Zheng

Prof. Xiao Zheng

Division of Theoretical and Computational Sciences, Hefei National Laboratory for Physical Sciences at Microscale, CAS Centre for Excellence and Synergetic Innovation Centre in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, 230026 China

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Prof. Jun-Fa Zhu

Prof. Jun-Fa Zhu

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029 China

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Prof. Min-Rui Gao

Corresponding Author

Prof. Min-Rui Gao

Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

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Prof. Shu-Hong Yu

Corresponding Author

Prof. Shu-Hong Yu

Division of Nanomaterials & Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, CAS Center for Excellence in Nanoscience, Hefei Science Center of CAS, Collaborative Innovation Center of Suzhou Nano Science and Technology, Department of Chemistry, University of Science and Technology of China, Hefei, 230026 China

Dalian National Laboratory for Clean Energy, Dalian, 116023 China

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First published: 16 August 2019
Citations: 541

Graphical Abstract

Amorphous NiFeMo oxide (up to 515 g one batch) with homogeneous elemental distribution was synthesized through a facile supersaturated co-precipitation method. The amorphous NiFeMo oxide undergoes rapid surface self-reconstruction during OER that forms a metal oxy(hydroxide) active layer with oxygen vacancies, enabling efficient OER catalysis.

Abstract

The anode oxygen evolution reaction (OER) is known to largely limit the efficiency of electrolyzers owing to its sluggish kinetics. While crystalline metal oxides are promising as OER catalysts, their amorphous phases also show high activities. Efforts to produce amorphous metal oxides have progressed slowly, and how an amorphous structure benefits the catalytic performances remains elusive. Now the first scalable synthesis of amorphous NiFeMo oxide (up to 515 g in one batch) is presented with homogeneous elemental distribution via a facile supersaturated co-precipitation method. In contrast to its crystalline counterpart, amorphous NiFeMo oxide undergoes a faster surface self-reconstruction process during OER, forming a metal oxy(hydroxide) active layer with rich oxygen vacancies, leading to superior OER activity (280 mV overpotential at 10 mA cm−2 in 0.1 m KOH). This opens up the potential of fast, facile, and scale-up production of amorphous metal oxides for high-performance OER catalysts.

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