01869nas a2200289   4500008004100000022001400041245009900055210006900154260007100223300001600294490000600310520085500316653001901171653002401190653002401214653001201238653002201250653003401272653001801306100002001324700002301344700001601367700002101383700002201404700002501426856012801451       2015                        eng d  a1944-824400aNiS1.97: a new efficient water oxidation catalyst for photoelectrochemical hydrogen generation0 aNiS197 a new efficient water oxidation catalyst for photoelectro  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcSEP  a20053-200600 v73 a<p>NiS1.97, a sulfur-deficient dichalcogenide, in nanoscale form, is shown to be a unique and efficient photoelectrochemical (PEC) catalyst for H-2 generation by water splitting. Phase pure NiS1.97 nanomaterial is obtained by converting nickel oxide into sulfide by controlled sulfurization method, which is otherwise difficult to establish. The defect states (sulfur vacancies) in this material increase the carrier density and in turn lead to favorable band line-up with respect to redox potential of water, rendering it to be an effective photoelectrochemical catalyst. The material exhibits a remarkable PEC performance of 1.25 mA/cm(2) vs NHE at 0.68 V in neutral pH, which is almost 1000 times superior as compared with that of the stoichiometric phase of NiS2. The latter is well-known to be a cocatalyst but not as a primary PEC catalyst.</p>10adichlacogenide10aFaradaic efficiency10aHydrogen generation10aNiS1.9710anonstoichiometric10aphotoelectrochemical catalyst10asulfurization1 aBhosale, Reshma1 aKelkar, Sarika, A.1 aParte, Golu1 aFernandes, Rohan1 aKothari, Dushyant1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/nis197-new-efficient-water-oxidation-catalyst-photoelectrochemical-hydrogen-generation-0