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Self-assembly of two-dimensional bimetallic nickel-cobalt phosphate nanoplates into one-dimensional porous chainlike architecture for efficient oxygen evolution reaction
Septiani N.L.W.a, Kaneti Y.V.b, Fathoni K.B.a, Kani K.c, Allah A.E.d, Yuliarto B.a, Nugrahaa, Dipojono H.K.a, Alothman Z.A., Golberg D.b,f, Yamauchi Y.c,g
a Department of Engineering Physics, Institute of Technology Bandung (ITB), Bandung, 40132, Indonesia
b International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), Tsukuba, 305-0044, Japan
c School of Chemical Engineering, Australian Institute for Bioengineering and Nanotechnology (AIBN), University of Queensland, Brisbane, 4072, Australia
d Department of Chemistry, Faculty of Science, Beni-Suef University, Beni-Suef, 62511, Egypt
e Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
f Centre for Materials Science, Queensland University of Technology, Brisbane, 4000, Australia
g Department of Plant and Environmental New Resources, Kyung Hee University, Giheung-gu, Yongin-si, Gyeonggi-do, 446-701, South Korea
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]Copyright © 2020 American Chemical Society.The self-assembly of two-dimensional (2D) nanostructures into one-dimensional (1D) nanoarchitectures may result in materials which combine the unique physicochemical properties of 2D nanostructures with the excellent charge transport properties of 1D architectures. Herein, we report the self-stacking of 2D nickel-cobalt (Ni-Co) phosphate nanoplates into 1D chainlike architectures with the assistance of metal glycerates as self-templates. This unique self-assembly process is driven by the adsorbed ethyl glycerate on the surface of the individual nanoplates, which promotes the subsequent growth of the new nanoplate on top of the previously formed nanoplate, thereby leading to the self-stacking of these nanoplates along the vertical direction. The flexibility of the proposed method is also highlighted by the feasible preparation of nickel phosphate with the same self-assembled structure. When tested as a catalyst for oxygen evolution reaction (OER) in an alkaline medium, the bimetallic Ni-Co phosphate (derived from Ni-Co-TEP) with the nanoplate-assembled chainlike structure displays much lower overpotential (η10= 310 mV) and Tafel slope (68 mV dec-1) than its pristine counterparts. The enhanced OER activity of this bimetallic catalyst may be attributed to (i) the highly interconnected structure and the bimetallic composition which promote improved charge transport; (ii) the porous chainlike structure which provides increased number of active sites, facilitates easier electrolyte infiltration, and promotes good electrical contact with the electrolyte, and (iii) the presence of Ni3+ and Co3+ active sites (nickel-cobalt (oxy)hydroxides) which can promote the chemisorption of OH- and facilitate electron transfer from the OH- to the surface Ni/Co sites during OER.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Bimetallic catalysts,Bimetallic compositions,Interconnected structures,Number of active sites,Oxygen evolution reaction (oer),Self assembled structures,Self assembly process,Two Dimensional (2 D)[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][{‘$’: ‘D.G. is grateful to the Australian Research Council (ARC) for granting a Laureate Fellowship (FL160100089) and to QUT project Nos. 323000-0355/51 and 323000-0348/07. The authors also acknowledge financial grants provided by Institute of Technology Bandung (ITB), the Ministry of Education and Culture and Ministry of Research and Technology under the grant scheme of the World Class University (WCU) Program managed by Institut Teknologi Bandung, Lembaga Pengelola Dana Pendidikan (LPDP), and Ministry of Finance of Indonesia. The authors thank Bill Gong from the UNSW Mark Wainwright Analytical Center for the XPS measurements and discussion. This work was partially supported by the Researchers Supporting Project No. (RSP-2020/1) King Saud University, Riyadh, Saudi Arabia. This work was performed in part at the Queensland node of the Australian National Fabrication Facility (ANFF), a company established under the National Collaborative Research Infrastructure Strategy to provide nano- and microfabrication facilities for Australian researchers.’}, {‘$’: ‘D.G. is grateful to the Australian Research Council (ARC) for granting a Laureate Fellowship (FL160100089) and to QUT project Nos. 323000-0355/51 and 323000-0348/07. The authors also acknowledge financial grants provided by Institute of Technology Bandung (ITB) the Ministry of Education and Culture and Ministry of Research and Technology under the grant scheme of the World Class University (WCU) Program managed by Institut Teknologi Bandung, Lembaga Pengelola Dana Pendidikan (LPDP), and Ministry of Finance of Indonesia. The authors thank Bill Gong from the UNSW Mark Wainwright Analytical Center for the XPS measurements and discussion. This work was partially supported by the Researchers Supporting Project No. (RSP-2020/1) King Saud University Riyadh, Saudi Arabia. This work was performed in part at the Queensland node of the Australian National Fabrication Facility (ANFF), a company established under the National Collaborative Research Infrastructure Strategy to provide nano- and microfabrication facilities for Australian researchers.’}][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1021/acs.chemmater.0c02385[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]