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Crystalline nickel boride nanoparticle agglomerates for enhanced electrocatalytic methanol oxidation
Affiliation:1. College of Pharmacy and Biological Engineering, Chengdu University, Chengdu, 610106, PR China;2. College of Chemistry, Sichuan University, Chengdu, 610064, PR China;3. College of Chemical Engineering, Sichuan University, Chengdu, 610064, PR China;4. College of Materials Engineering, Chengdu University, Chengdu, 610106, PR China;1. Department of Physics, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai, 400098, India;2. School of Engineering, University of Liverpool, Brownlow Hill, L69 3GH, Liverpool, United Kingdom;3. Dipartimento di Fisica, Università degli Studi di Trento, I-38123, Povo, Trento, Italy;1. State Key Laboratory of Fine Chemicals, DUT-KTH Joint Education and Research Centre on Molecular Devices, Dalian University of Technology (DUT), Dalian 116024, China;2. National Synchrotron Radiation Laboratory, University of Science and Technology of China (USTC), Hefei 230029, China;3. Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China (USTC), Hefei 230026, China;4. Department of Chemistry, KTH Royal Institute of Technology, Stockholm 10044, Sweden;1. Department of Physics and National Centre for Nanosciences & Nanotechnology, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai 400098, India;2. Dipartimento di Fisica, Università degli Studi di Trento, I-38123 Povo, Trento, Italy;1. School of Chemistry and Chemical Engineering, Xi''an University of Science and Technology, Xi''an, 710054, China;2. State Key Laboratory for Mechanical Behavior of Materials, School of Material Science and Engineering, Xi''an Jiaotong University, Xi''an, 710049, China;3. Department of Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle Upon Tyne, NE1 8ST, United Kingdom
Abstract:In this paper, crystalline Ni3B nanoparticle agglomerates have been successfully prepared via dry-powder annealing of the solution-produced amorphous nickel boride. The electron microscopy (EM) images indicate that the Ni3B nanomaterial is composed of numerous nano-sized particles with a diameter ranging from 100 to 200 nm. The electrocatalytic characteristics of nickel boride in an alkaline medium were observed by cyclic voltammetry (CV) and chronoamperomerty (CA). Compared to the amorphous nickel boride/Ni foam (ANB/NF), the crystalline Ni3B/Ni foam (CNB/NF) electrode exhibits a higher catalytic performance with low initial oxidation potential of 0.35 V and a high anodic oxidation current density of 62 A g−1 at 0.55 V in a 6 M KOH solution with 0.5 M methanol. And the CNB/NF electrode shows good long-term cycling stability and the catalytic current of methanol retains 87% of the initial value after 1000 time cycles. The CNB/NF electrode should be a promising candidate for alkaline direct methanol fuel cells (DMFCs).
Keywords:Amorphous nickel boride  Crystalline nickel boride  Heterogeneous catalysis  Methanol oxidation
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