Carbon‐Enriched Cobalt Phosphide with Assorted Nanostructure as a Multifunctional Electrode for Energy Conversion and Storage Devices

Abstract

A single‐step hydrothermal technique is applied to prepare cobalt phosphide with multifarious nanostructures to signify its multifunctional capabilities. The prepared electrodes were intensely analysed for both the energy conversion and energy storage systems. The acquired Co−P with the assorted morphology of scaffolds and spherical of Co2P/C electrode inspires with a significantly lower oxygen evolution reaction (OER) (271 mV()η10 ) and hydrogen evolution reaction (HER) (207 mV()η10 ) overpotentials to accelerate progressive electrocatalytic activity. Additionally, the energy storage capacity was revealed with the Co2P electrode delivering an enriched specific capacity (322 C g−1 at 1 A g−1) in conjunction with noteworthy rate capability (83%) and durable cycling stability (10000 cycles). Overall, an aqueous supercapattery device (Co2P/C∥AC) was fabricated providing superior energy density (35 Wh kg−1) and an improved power density (5333 W kg−1). The assembled water splitting system demanded a low cell voltage of 1.63 V to afford a high current density of 10 mA cm−2. Moreover, the fabricated Co2P/C∥AC supercapattery coupled with the assembled water splitting system, to promote a supercapattery driven water splitting system profoundly proving the Co2P propensity of handling the multifunctional challenges in terms of both storage and conversion aspects.

Open-Microcolumn Array: A Novel Approach for Enhanced Electrocatalytic Bubble Desorption in Microreactors

“…Figure a displays high-resolution XPS spectra of Co 2p, where the split peaks correspond to Co 2p 3/2 and Co 2p 1/2 orbitals, respectively. The deconvolution results indicated coexistence of Co 3+ (780.1 and 796.0 eV) and Co 2+ (781.4 and 797.4 eV). , The incorporation of Fe resulted in an increased abundance of Co 3+ in Co 4 Fe 0.5 Ni 0.5 OOH-NRs (29.5 at. %) and Co 4 FeOOH-NRs (42.4 at.…”

Cu intercalation and defect engineering realize an atomic-scale hydrogen spillover effect in NbS2 to boost acidic hydrogen evolution

“…In the past few decades, the research on hydrogen evolution of transition metal-based materials (such as nitrides, phosphides, sulfides and so on) has made great progress. 9,[13][14][15][16] In particular, layered transition metal dichalcogenides (TMDs) have emerged as potential alternatives to Pt-based catalysts. 9 As a representative example, MoS 2 with an appropriate ΔG H* value has been widely studied, 17,18 although its active sites are located at the layer edge.…”

Recent Progress in the Development of Advanced Functionalized Electrodes for Oxygen Evolution Reaction: An Overview

“…Interestingly, a nitrogen-enriched graphene quantum dots (C-GQDs) catalyst was developed with an efficient electrocatalytic activity, and the charge distribution of pyridine and pyridine N-oxide is induced through the π–π delocalization process, which could encourage their OER activity [ 19 ]. Surendran et al [ 20 ] hydrothermally synthesized the spherically nanostructured carbon-enriched cobalt phosphide multi-functional electrode for water electrolyzer studies, and reported the current density of 10 mA cm −2 @ 1.63 V. Qian et al [ 21 ] prepared a cost-effective, larger specific surface area with high electrically conductive natured MWCNTs for the making of a thermo-electrochemical (TEC) catalyst by the electrochemical deposition (EPD) method. The prepared MWCNT TEC catalyst could display a high power density (45.2 A cm −2 ) with long-term cyclic stability.…”