Virus-templated Pt–Ni(OH)₂ nanonetworks for enhanced electrocatalytic reduction of water
Name
PtNi(OH)2_DSPACE.pdf
Description
Accepted version
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1.56 MB
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Checksum (MD5)
55c61c31139aed122e363b2c57ce5fa0
Author(s)
Records, William Christopher
Yoon, Youngmin
Ohmura, Jacqueline Frances
Chanut, Nicolas
Belcher, Angela M
Date Issued
April 2019
Journal
Nano Energy
Publisher
Elsevier
Citation
Virus-templated Pt–Ni(OH)₂ nanonetworks for enhanced electrocatalytic reduction of water © 2019 Elsevier Ltd
Version
Author's final manuscript
Abstract
Clean hydrogen production via water electrolysis is incumbent upon the development of high-performing hydrogen evolution reaction electrocatalysts. Despite decades of commercial maturity, however, alkaline water electrolyzers continue to suffer from limitations in electrocatalytic activity and stability, even with noble metal catalysts. In recent years, combining platinum with oxophilic materials, such as metal hydroxides, has shown great promise for improving performance potentially by enabling stronger water dissociation at the surface of electrocatalysts. In this work, we leveraged the nanoscopic proportions and surface programmability of the filamentous M13 bacteriophage in the design, synthesis, and exceptional performance of 3D nanostructured biotemplated electrocatalysts for alkaline hydrogen evolution. We developed a facile synthesis method for phage-templated, Pt–Ni(OH)₂ nanonetworks, relying on scalable techniques like electroless deposition. After optimization of the platinum content, our materials display –4.9 A mg⁻¹Pt at −70 mV versus the reversible hydrogen electrode, the highest reported mass activity in 1 M KOH to date, and undergo minimal changes in overpotential under galvanostatic operation at −10 mA cm⁻²[subscript geo]. Looking forward, the performance of these catalysts suggests that biotemplating nanostructures with M13 bacteriophage offers an interesting new route for developing high-performing electrocatalysts. Keywords: Hydrogen evolution reaction; Electrocatalysis; M13 bacteriophage; 3D nanostructure; Biotemplating
MIT Department
Massachusetts Institute of Technology. Department of Chemical Engineering
Massachusetts Institute of Technology. Department of Chemistry
Massachusetts Institute of Technology. Department of Biological Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
MultiScale Materials Science for Energy and Environment, Joint MIT-CNRS Laboratory
MIT Energy Initiative
Koch Institute for Integrative Cancer Research at MIT
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.nanoen.2018.12.083
