01629nas a2200265   4500008004100000022001400041245013100055210006900186260000800255300001400263490000600277520070900283653002500992653003201017653003001049653001501079653002001094100001901114700001901133700001801152700001801170700002001188700002501208856013001233       2020                        eng d  a2574-096200aStress-induced electronic structure modulation of manganese-incorporated Ni2P leading to enhanced activity for water splitting0 aStressinduced electronic structure modulation of manganeseincorp  cFEB  a1271-12780 v33 a<p>The cornerstone of the emerging hydrogen economy is hydrogen production by water electrolysis with concomitant oxygen generation. Incorporating a third element in metal phosphides can tune the crystalline and electronic structure, hence improving the electrocatalytic properties. In this work, Mn-doped Ni2P with varying ratios of Mn and Ni has been explored as excellent catalysts for water splitting. A complete cell made of the best catalyst Ni1.5Mn0.5P electrodes showed low voltage of 1.75 V at a current density of 10 mA cm(-2) due to enhanced electrical conductivity, induction of tensile stress, enhanced electrochemical surface area, and increased electric dipole upon Mn incorporation.</p>
10aElectronic Structure10ahydrogen evolution reaction10aOxygen Evolution Reaction10aphosphides10awater splitting1 aSarkar, Shreya1 aDheer, Lakshay1 aVinod, C., P.1 aThapa, Ranjit1 aWaghmare, Umesh1 aPeter, Sebastian, C.  uhttp://library.ncl.res.in/content/stress-induced-electronic-structure-modulation-manganese-incorporated-ni2p-leading-enhanced02451nas a2200229   4500008004100000022001400041245011000055210006900165260000800234300001600242490000700258520164600265100001901911700001701930700002501947700002201972700002001994700002602014700002702040700002902067856012502096       2022                        eng d  a2050-748800aHeterostructure from heteromixture: unusual OER activity of FeP and CoP nanostructures on physical mixing0 aHeterostructure from heteromixture unusual OER activity of FeP a  cNOV  a22354-223620 v103 a<p>
	Heterointerfaces generated by inter-domain interactions on a nanoscale play a critical role in altering the activity of an electrocatalyst towards an electrochemical process. Heterointerfaces affect the surface characteristics, electronic structure, and physicochemical properties of a nanomaterial. Herein, we report an FeP-CoP heterostructure prepared by simple physical mixing of FeP and CoP nanostructures showing a remarkable performance towards water oxidation in comparison to their individual monometallic phosphides. FeP mixed with 20 wt% CoP shows a low overpotential (eta(10)) of 220 mV as compared to FeP (eta(10), 325 mV). Furthermore, a high current density of 1.37 A cm(-2) and mass activity of 18 987 A g(M)(-1) were also achieved at 500 mV overpotential in 1.0 M KOH. The physical mixture shows immense stability for 200 h to achieve a high current density of 200 mA cm(-2). Meanwhile the potentiostatic performance of FeP at 200 mA cm(-2) decreases to an extent of 50% in 40 h. A full cell arrangement employing this catalyst as the anode material requires 1.56 V to attain a current density of 10 mA cm(-2). Various characterization techniques, control experiments and theoretical studies indicate that the formation of heterointerfaces between the nano-domains of FeP and CoP results in charge transfer between Fe and Co metal sites. In addition, an oxygenated surface at the metal phosphide interface favours the sorption kinetics of intermediates involved in the reaction leading to low energy barriers in the potential determining and other steps, thus showing improved performance towards water oxidation.</p>
1 aBhutani, Divya1 aMaity, Sisir1 aChaturvedi, Shashank1 aChalapathi, Divya1 aWaghmare, Umesh1 aNarayana, Chandrabhas1 aPrabhakaran, Vinod, C.1 aMuthusamy, Eswaramoorthy  uhttp://library.ncl.res.in/content/heterostructure-heteromixture-unusual-oer-activity-fep-and-cop-nanostructures-physical