Cobalt Hydroxide Spindle Nanosheet Amorphous Electrocatalysts via In‐Situ Fast Reduction Release/Oxidization Mechanistic Method for Efficient Overall Water Electrolysis

Abstract

Water electrolysis focused with electricity or sunlight is one of the sustainable methods to produce hydrogen; this helps to address the global energy demand whereas sluggish OER and HER kinetic barriers hamper this process. Here, we report an earth abundant Co(OH)2 spindle nanosheet electrocatalyst synthesized via surfactant with boron‐assisted release/oxidize mechanistic process and employed it as a bifunctional electrocatalyst (OER/HER) with small overpotential (258 mV/156 mV), low Tafel slope (78 mV dec−1/71 mV dec−1), higher turnover frequency (0.235 s−1/0.100 s−1) and low charge transfer resistance (4.7 Ω). The higher electrochemical active surface area (45 cm2) of the catalyst exploits the potential electrocatalyst nature with overall cell voltage 1.64 V at 10 mA cm−2.

Greenly Synthesized CoPBA@PANI as a Proficient Electrocatalyst for Oxygen Evolution Reaction and Its Green Sustainability Assessments

“…Hence, the need for low voltage consumption by CoPBA@PANI-200 for solar-to-hydrogen production becomes another important concern. During electrolysis, the quantity of released H 2 was determined to be 4.12 mmol h –1 cm –2 , which is equivalent to a faradic efficiency of ∼97.5% . The cost-effective small demonstration strongly supports the nanospherical CoPBA@PANI-200 as a novel candidate for large-scale solar-to-hydrogen generation.…”

In situ hierarchical self-assembly of NiFeHCF nanoparticles on nickel foam: highly active and ultra-stable bifunctional electrocatalysts for water splitting and their environmental assessment towards green energy

“…S13 †). 60 Therefore, the solar-based water electrolyser developed in the present work is highly advised for inexpensive large-scale H 2 generation.…”

Biowaste-Derived Interconnected Carbon Nanosheet-Supported Iron as a Highly Stable and Excellent Electrocatalyst for Overall Water Splitting

“…The amount of H 2 and O 2 produced by using water electrolyzer Fe@PSAC//Fe@PSAC was 6.17 and 3.05 μmol/min, respectively, which was nearly equal to 96% Faradaic efficiency (Figure S17). Hence, the solar-assisted water splitting cell established in the current study is strongly recommended for large-scale, low-cost H 2 production.…”