Metal-free pristine halloysite nanotubes: Electrochemically active and stable oxygen evolution reaction

Optimised Ni3+/Ni2+ and Mn3+/Mn2+ Ratios in Nickel Manganese Layered Double Hydroxide for Boosting Oxygen and Hydrogen Evolution Reactions

“…The obtained results (Figure S4) also show that the 0.05 M NiMn LDH sample has higher OER catalytic activity. The four‐step OER reaction mechanism occurring in alkaline solution is given in the following Equations (1– [44] …”

“…The four-step OER reaction mechanism occurring in alkaline solution is given in the following Equations (1-4). [44] M…”

NiSe2 Nanoparticles Supported on Halloysite Sheets as an Efficient Electrocatalyst toward Alkaline Oxygen Evolution Reaction

“…Halloysite-based composites are good candidates for synthesizing efficient adsorbents, , electrocatalysts, , and photocatalysts. , In the last several years, this class of materials has been explored for photocatalytic hydrogen generation. ,,, Halloysite with numerous hydroxyl groups on the surface has considerable cation/anion exchange potential, which could enhance electrocatalytic activity . However, there are few studies on the electrocatalytic performance of halloysite-based materials for OER …”

“…Between the large numbers of materials studied, naturally abundant clay minerals with unique nanostructures, low cost, and stable physicochemical properties are believed to provide powerful candidates for electrocatalytic water splitting. , Halloysite is a widespread and inexpensive alumino-silicate clay mineral that can adopt different morphologies, including spheroidal, fibers, onions, platy shape, prismatic, and short tubular structures . Halloysite has been widely studied for various applications due to its significant properties such as high surface/volume ratio, tunable surface chemistry, rich active sites, good thermal stability, and high mechanical properties. , Halloysite has been proven as a promising material for the formation of composites for environmental applications, resulting in a pronounced improvement in the performance of the final composite, benefitting from the synergism between the two components.…”

“…31 However, there are few studies on the electrocatalytic performance of halloysite-based materials for OER. 19 Transition metal chalcogenides (TMCs) have been shown to be stable and active materials in a large number of electrochemical processes. 32−35 category, transition metal selenides have been successfully employed as electrocatalysts for water splitting due to their relatively lower intrinsic resistivity.…”