02514nas a2200301   4500008004100000022001400041245012200055210006900177260000800246300001200254490000700266520151500273653002101788653002401809653001901833653002301852100001801875700001901893700002201912700001601934700001501950700002701965700003301992700001802025700002302043700002502066856012102091       2022                        eng d  a0935-964800aMorphology-tuned Pt3Ge accelerates water dissociation to industrial-standard hydrogen production over a wide pH range0 aMorphologytuned Pt3Ge accelerates water dissociation to industri  cJUL  a22022940 v343 a<p>
	The discovery of novel materials for industrial-standard hydrogen production is the present need considering the global energy infrastructure. A novel electrocatalyst, Pt3Ge, which is engineered with a desired crystallographic facet (202), accelerates hydrogen production by water electrolysis, and records industrially desired operational stability compared to the commercial catalyst platinum is introduced. Pt3Ge-(202) exhibits low overpotential of 21.7 mV (24.6 mV for Pt/C) and 92 mV for 10 and 200 mA cm(-2) current density, respectively in 0.5 m H2SO4. It also exhibits remarkable stability of 15 000 accelerated degradation tests cycles (5000 for Pt/C) and exceptional durability of 500 h (@10 mA cm(-2)) in acidic media. Pt3Ge-(202) also displays low overpotential of 96 mV for 10 mA cm(-2) current density in the alkaline medium, rationalizing its hydrogen production ability over a wide pH range required commercial operations. Long-term durability (&gt;75 h in alkaline media) with the industrial level current density (&gt;500 mA cm(-2)) has been demonstrated by utilizing the electrochemical flow reactor. The driving force behind this stupendous performance of Pt3Ge-(202) has been envisaged by mapping the reaction mechanism, active sites, and charge-transfer kinetics via controlled electrochemical experiments, ex situ X-ray photoelectron spectroscopy, in situ infrared spectroscopy, and in situ X-ray absorption spectroscopy further corroborated by first principles calculations.</p>
10aElectrochemistry10ahydrogen production10aintermetallics10awater electrolysis1 aMondal, Soumi1 aSarkar, Shreya1 aBagchi, Debabrata1 aDas, Tisita1 aDas, Risov1 aSingh, Ashutosh, Kumar1 aPrasanna, Ponnappa, Kechanda1 aVinod, C., P.1 aChakraborty, Sudip1 aPeter, Sebastian, C.  uhttp://library.ncl.res.in/content/morphology-tuned-pt3ge-accelerates-water-dissociation-industrial-standard-hydrogen02688nas a2200337   4500008004100000022001400041245014200055210006900197260000800266490000700274520145100281653004201732653003801774653002701812653003601839653003601875653002801911653002301939100002001962700003001982700002702012700003002039700002702069700002402096700002102120700001802141700001802159700002602177700002402203856012302227       2023                        eng d  a1613-681000aActive site engineering and theoretical aspects of ``Superhydrophilic'' nanostructure array enabling efficient overall water electrolysis0 aActive site engineering and theoretical aspects of Superhydrophi  cDEC0 v193 a<p>The rational design of noble metal-free electrocatalysts holds great promise for cost-effective green hydrogen generation through water electrolysis. In this context, here, the development of a superhydrophilic bifunctional electrocatalyst that facilitates both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in alkaline conditions is demonstrated. This is achieved through the in situ growth of hierarchical NiMoO4@CoMoO4 center dot xH(2)O nanostructure on nickel foam (NF) via a two-step hydrothermal synthesis method. NiMoO4@CoMoO4 center dot xH(2)O/NF facilitates OER and HER at the overpotentials of 180 and 220 mV, respectively, at the current density of 10 mA cm(-2). The NiMoO4@CoMoO4 center dot xH(2)O/NF parallel to NiMoO4@CoMoO4 center dot xH(2)O/NF cell can be operated at a potential of 1.60 V compared to 1.63 V displayed by the system based on the Pt/C@NF parallel to RuO2@NF standard electrode pair configuration at 10 mA cm(-2) for overall water splitting. The density functional theory calculations for the OER process elucidate that the lowest Delta G of NiMoO4@CoMoO4 compared to both Ni and NiMoO4 is due to the presence of Co in the OER catalytic site and its synergistic interaction with NiMoO4. The preparative strategy and mechanistic understanding make the windows open for the large-scale production of the robust and less expensive electrode material for the overall water electrolysis.</p>
10adensity functional theory (DFT) study10ahydrogen evolution reaction (HER)10aHydrothermal synthesis10aoxygen evolution reaction (OER)10asuperhydrophilic nanostructures10asynergistic interaction10awater electrolysis1 aBarik, Sidharth1 aKharabe, Geeta, Pandurang1 aIllathvalappil, Rajith1 aSingh, Chandrodai, Pratap1 aKanheerampockil, Fayis1 aWalko, Priyanka, S.1 aBhat, Suresh, K.1 aDevi, Nandini1 aVinod, C., P.1 aKrishnamurty, Sailaja1 aKurungot, Sreekumar  uhttp://library.ncl.res.in/content/active-site-engineering-and-theoretical-aspects-superhydrophilic-nanostructure-array