02288nas a2200217 4500008004100000022001400041245016200055210006900217260000900286300001200295490000800307520147800315653002101793653002001814653002201834653003401856653001401890100001901904700002701923856012001950 2024 eng d a0021-979700aTensile nanostructured hierarchically porous non-precious transition metal-based electrocatalyst for durable anion exchange membrane-based water electrolysis0 aTensile nanostructured hierarchically porous nonprecious transit cJUN  a389-3990 v6643 a

Electrochemical water electrolysis is a promising method for sustainable hydrogen production while transiting towards hydrogen economy. Among many, the Anion Exchange Membrane (AEM) based water electrolyzer is an emerging yet potentially affordable technology on maturity for producing large-scale hydrogen accommodating the usage of Non-Platinum Group Metal (non-PGM) based inexpensive electrocatalysts. Herein, we demonstrate the excellent performance of a bifunctional Nickel Copper Phosphide-Nickel sulphide (NCP-NS) electrocatalyst with a unique tensile nanostructure obtained via a facile, controlled ambient galvanic displacement route. An AEM electrolyzer with a larger active area of 10 cm(2) stacked with the symmetric NCP-NS electrodes and a membrane demonstrates scalability with a requirement of a mere 1.66 V to reach a current density of 10 mA cm(-2). The nickel-copper phosphide boosts the kinetics of charge transfer between the electrode and electrolyte interface, while a unique combination of a few nickel sulphide phases present in the catalyst provides sufficiently appropriate active sites for the overall water electrolysis. For the first time, we report a room temperature performance of similar to 230 mA cm(-2) at 2 V for a non-PGM-based bifunctional electrocatalyst with exceptional durability for over 300 h of operation in an AEM water electrolyser with a retention rate of 95 %-97 % at a current density range of 80-800 mA cm(-2).

10aAEM electrolyzer10aBifunctionality10aElectrodeposition10aNon-PGM based Electrocatalyst10astability1 aSingh, Kailash1 aSelvaraj, Kaliaperumal uhttps://library.ncl.res.in/content/tensile-nanostructured-hierarchically-porous-non-precious-transition-metal-based02495nas a2200241 4500008004100000022001400041245012000055210006900175260000800244300001100252490000800263520161100271653004701882653003301929653003201962653003001994653001202024100001902036700002002055700001902075700002702094856013202121 2025 eng d a0013-468600aHighly active and durable MNS bifunctional electrocatalysts for enhanced anion exchange membrane water electrolysis0 aHighly active and durable MNS bifunctional electrocatalysts for  cDEC a1474080 v5423 a

The development of non-platinum group metal (non-PGM) electrocatalysts with performance comparable to their noble metal counterparts remains a significant challenge for overall water splitting. In this study, we demonstrate the performance of an Anion Exchange Membrane (AEM) water electrolyzer using a bifunctional, non-PGM electrocatalyst: reduced graphene oxide (rGO)-encapsulated MoS2/Ni3S2 (MNS) grown on a nickel foam (NF) substrate. The rGO/MoS2/Ni3S2 (rGO-MNS) electrode was synthesized via a facile, single-step hydrothermal method. For the hydrogen evolution reaction (HER), the rGO-MNS electrode exhibited a low overpotential of 94 mV at a current density of 100 mA cm-2, maintaining excellent stability over 50 h with a minimal degradation rate of 120 mu V h-1. In the case of the oxygen evolution reaction (OER), an overpotential of 410 mV was required to reach the same current density, with a similarly robust durability and a degradation rate of only 360 mu V h-1. When employed as symmetric electrodes for overall water electrolysis, the rGO-MNS system achieved a current density of 10 mA cm-2 at a cell voltage of 1.51 V, outperforming the benchmark Pt/C & Vert;Ru/C catalyst pair, which required 1.58 V to reach the same performance. The enhanced electrocatalytic activity and durability are attributed to the conductive rGO encapsulation, which facilitates charge transfer and mitigates surface oxidation of the catalyst. These results present a promising strategy for designing cost-effective, durable, and highperformance non-PGM electrodes for AEM water electrolysis.

10aAnion Exchange Membrane Water Electrolysis10aBifunctional Electrocatalyst10ahydrogen evolution reaction10aOxygen Evolution Reaction10arGO-MNS1 aSingh, Kailash1 aYadav, Himanshu1 aSamdani, Kunda1 aSelvaraj, Kaliaperumal uhttps://library.ncl.res.in/content/highly-active-and-durable-mns-bifunctional-electrocatalysts-enhanced-anion-exchange-membrane01822nas a2200157 4500008004100000022001400041245012900055210006900184260000800253300001400261490000700275520120700282100001901489700002701508856012901535 2025 eng d a0888-588500aMaterial selection for enhanced performance in anion exchange membrane water electrolyzers: a study of membranes and gaskets0 aMaterial selection for enhanced performance in anion exchange me cMAR a7211-72190 v643 a

Anion exchange membrane water electrolyzer (AEMWE) is an emerging technology for large-scale hydrogen production, where membrane electrode assembly (MEA) plays a critical role in the electrolyzer efficiency. This study investigates the effects of different membranes (Piperion, Aemion, and Sustainion) and gaskets (Viton, poly(tetrafluoroethylene) (PTFE), and Silicon) using a non-platinum group metal (non-PGM) bifunctional electrocatalyst under fixed compression and flow rates. Membrane properties such as ionic resistance and diffusion and gasket properties like thermal suitability and compressibility significantly affect the overall performance of AEMWE. The results indicate that Sustainion and Aemion membranes are best suited for lab-scale and industrial applications, respectively, while Silicon and PTFE gaskets are optimal for corresponding scales. Understanding these effects can help to improve the efficiency and guide material selection. This study provides valuable insights for researchers developing AEMWE technology, enabling advancements from laboratory research to megawatt-level industrial hydrogen production and supporting the transition to clean-energy solutions.

1 aSingh, Kailash1 aSelvaraj, Kaliaperumal uhttps://library.ncl.res.in/content/material-selection-enhanced-performance-anion-exchange-membrane-water-electrolyzers-study