Cr-dopant induced crystal orientation and shape modulation in Ni2P nanocrystals for improving electrosynthesis of methanol to formate coupled with hydrogen production

Simultaneously improving the electrochemical methanol oxidation reaction (MOR) and hydrogen evolution reaction (HER) using the electrolysis technique is a significant yet challenging task. To tackle this, we report a colloidal synthesis of Cr-dopant induced crystal orientation and shape modulation i...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2024, Vol.12 (25), p.15127-15136
Main Authors: Suryawanshi, Umesh P, Ghorpade, Uma V, Yuwono, Jodie A, Kumar, Priyank V, Gaikwad, Mayur A, Shin, Seung Wook, Jun Sung Jang, Hyo Rim Jung, Suryawanshi, Mahesh P, Kim, Jin Hyeok
Format: Article
Language:English
Subjects:
Catalysts
Chromium
Crystal structure
Crystals
Dehydrogenation
Dopants
Electric potential
Electrocatalysts
Electrochemistry
Electrolysis
Energy efficiency
Hydrogen
Hydrogen evolution reactions
Hydrogen production
Methanol
Modulation
Nanocrystals
Nanorods
Oxidation
Photoelectric effect
Photovoltaic cells
Photovoltaics
Voltage
Water splitting
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Simultaneously improving the electrochemical methanol oxidation reaction (MOR) and hydrogen evolution reaction (HER) using the electrolysis technique is a significant yet challenging task. To tackle this, we report a colloidal synthesis of Cr-dopant induced crystal orientation and shape modulation in Ni2P nanocrystals (NCs) as an advanced bifunctional electrocatalyst for electrosynthesis of value-added formate from the MOR at the anode and hydrogen at the cathode. We demonstrate that a two-electrode overall methanol splitting (OMeS) system using Cr-doped Ni2P nanorods (NRs) as a bifunctional catalyst can achieve a lowest voltage of 1.16 V to reach a current density of 10 mA cm−2, compared to the cell voltage of 1.65 V for overall water splitting. Combined experimental and theoretical investigations revealed that the Cr-dopant induces shape modulation and crystal orientation in Ni2P, which favors the thermodynamics of the dehydrogenation process in the MOR and hydrogen adsorption in the HER, leading to enhanced electrocatalytic activities. Interestingly, a proof-of-concept solar-driven system fabricated using a commercial Si photovoltaic cell integrated with an OMeS cell employing bifunctional Cr-doped Ni2P NRs generated a stable photocurrent density of ∼12.3 mA cm−2 for 60 min., demonstrating its promise for energy-efficient and selective electrosynthesis, enabling the production of valuable chemicals and clean hydrogen in a sustainable manner.
ISSN:2050-7488
2050-7496
DOI:10.1039/d4ta01147c