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Ultrathin Porous NiFeV Ternary Layer Hydroxide Nanosheets as a Highly Efficient Bifunctional Electrocatalyst for Overall Water Splitting.
Dinh, Khang Ngoc; Zheng, Penglun; Dai, Zhengfei; Zhang, Yu; Dangol, Raksha; Zheng, Yun; Li, Bing; Zong, Yun; Yan, Qingyu.
Afiliación
  • Dinh KN; Energy Research Institute @ NTU (ERI@N), Interdisciplinary Graduate School, Nanyang Technological University, Singapore, 637553, Singapore.
  • Zheng P; School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
  • Dai Z; School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
  • Zhang Y; Energy Research Institute @ NTU (ERI@N), Interdisciplinary Graduate School, Nanyang Technological University, Singapore, 637553, Singapore.
  • Dangol R; School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
  • Zheng Y; School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
  • Li B; School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
  • Zong Y; School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
  • Yan Q; Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way Innovis #08-03, Singapore, 138634, Singapore.
Small ; 14(8)2018 02.
Article en En | MEDLINE | ID: mdl-29280276
Herein, the hydrothermal synthesis of porous ultrathin ternary NiFeV layer double hydroxides (LDHs) nanosheets grown on Nickel foam (NF) substrate as a highly efficient electrode toward overall water splitting in alkaline media is reported. The lateral size of the nanosheets is about a few hundreds of nanometers with the thickness of ≈10 nm. Among all molar ratios investigated, the Ni0.75 Fe0.125 V0.125 -LDHs/NF electrode depicts the optimized performance. It displays an excellent catalytic activity with a modest overpotential of 231 mV for the oxygen evolution reaction (OER) and 125 mV for the hydrogen evolution reaction (HER) in 1.0 m KOH electrolyte. Its exceptional activity is further shown in its small Tafel slope of 39.4 and 62.0 mV dec-1 for OER and HER, respectively. More importantly, remarkable durability and stability are also observed. When used for overall water splitting, the Ni0.75 Fe0.125 V0.125 -LDHs/NF electrodes require a voltage of only 1.591 V to reach 10 mA cm-2 in alkaline solution. These outstanding performances are mainly attributed to the synergistic effect of the ternary metal system that boosts the intrinsic catalytic activity and active surface area. This work explores a promising way to achieve the optimal inexpensive Ni-based hydroxide electrocatalyst for overall water splitting.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Small Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2018 Tipo del documento: Article País de afiliación: Singapur Pais de publicación: Alemania
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Small Asunto de la revista: ENGENHARIA BIOMEDICA Año: 2018 Tipo del documento: Article País de afiliación: Singapur Pais de publicación: Alemania