Bimetallic copper nickel sulfide electrocatalyst by one step chemical bath deposition for efficient and stable overall water splitting applications

Modulating the Intrinsic Electrocatalytic Activity of Copper Sulfide by Silver Doping for Electrocatalytic Overall Water Splitting

“…It also ensures that the interaction between Cu−Ni is consistent in all the samples and the self‐standing nature of the grown catalyst. The S 2p peaks exhibit four major components namely SO 4 2− , SO 3 2− , S 2 2− , S 2− for CuS and CuS Ag20 [24] . Meanwhile, CuS Ag5 and CuS Ag10 show an additional S−S bond along with the above four components (Figure 4c).…”

“…(Figure 4a ) yielded two components of Cu 2p namely Cu 1+ and Cu 2+ at the binding energy of 933.9 eV and 937.1 eV, respectively, and a satellite peak [24] . The Cu 1+ peaks of Ag doped samples shows a little higher energy shift indicating the electronic interactions between Cu−S and Ag−S leading to the redistribution of charge at their interfaces [25] .…”

“…The S 2p peaks exhibit four major components namely SO 4 2À , SO 3 2À , S 2 2À , S 2À for CuS and CuS Ag20. [24] Meanwhile, CuS Ag5 and CuS Ag10 show an additional SÀ S bond along with the above four components (Figure 4c). Finally, the Ag doped samples exhib-ited Ag 3d peaks which upon deconvolution yielded two components and are indexed as Ag 0 and Ag 1 + at 367.5 eV and 368.2 eV, respectively as shown in Figure 4d.…”

“…The deconvoluted Cu (Figure 4a) yielded two components of Cu 2p namely Cu 1 + and Cu 2 + at the binding energy of 933.9 eV and 937.1 eV, respectively, and a satellite peak. [24] The Cu 1 + peaks of Ag doped samples shows a little higher energy shift indicating the electronic interactions between CuÀ S and AgÀ S leading to the redistribution of charge at their interfaces. [25] Figure 4b illustrates the deconvoluted Ni 2p 3/2 with two key components namely Ni 2 + and Ni 3 + at the binding energy 856 eV and 857.5 eV, respectively, and a satellite peak.…”

Hollow CoP Encapsulated in an N-Doped Carbon Nanocage as an Efficient Bifunctional Electrocatalyst for Overall Water Splitting

“…Currently, water splitting driven by electricity has provided a possible solution for high-purity hydrogen production with no carbon emission on a large scale. The overall water splitting consists of the hydrogen evolution reaction (HER) at the cathode and oxygen evolution reaction (OER) at the anode, both of which suffer from sluggish kinetics and high-energy barriers. − Therefore, highly active electrocatalysts are necessary to implement the water splitting with high-energy-utilization efficiency. Unfortunately, most of the state-of-the-art noble Pt/C, RuO 2 , and IrO 2 , and even the popular transition-metal-based catalysts, are functional for just a single half reaction.…”