<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ivanovskaya, Anna</style></author><author><style face="normal" font="default" size="100%">Singh, Nirala</style></author><author><style face="normal" font="default" size="100%">Liu, Ru-Fen</style></author><author><style face="normal" font="default" size="100%">Kreutzer, Haley</style></author><author><style face="normal" font="default" size="100%">Baltrusaitis, Jonas</style></author><author><style face="normal" font="default" size="100%">Van Nguyen, Trung</style></author><author><style face="normal" font="default" size="100%">Metiu, Horia</style></author><author><style face="normal" font="default" size="100%">McFarland, Eric.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Transition Metal Sulfide Hydrogen Evolution Catalysts for Hydrobromic Acid Electrolysis.</style></title><secondary-title><style face="normal" font="default" size="100%">Langmuir</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">transition metal sulfide hydrogen catalyst hydrobromic acid electrolysis</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2013</style></year></dates><publisher><style face="normal" font="default" size="100%">American Chemical Society</style></publisher><volume><style face="normal" font="default" size="100%">29</style></volume><pages><style face="normal" font="default" size="100%">480 - 492</style></pages><isbn><style face="normal" font="default" size="100%">0743-7463</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Mixed metal sulfides contg. combinations of W, Fe, Mo, Ni, and Ru were synthesized and screened for activity and stability for the H evolution reaction (HER) in aq. HBr.  Co- and Ni-substituted RuS2 were identified as potentially active HER electrocatalysts by high-throughput screening (HTS), and the specific compns. Co0.4Ru0.6S2 and Ni0.6Ru0.4S2 were identified by optimization.  H evolution activity of Co0.4Ru0.6S2 in HBr is greater than RuS2 or CoS2 and comparable to Pt and com. RhxSy.  Structural and morphol. characterizations of the Co-substituted RuS2 suggest that the nanoparticulate solids are a homogeneous solid soln. with a pyrite crystal structure.  No phase sepn. is detected for Co substitutions &lt;30% by x-ray diffraction.  In 0.5 M HBr electrolyte, the Co-Ru electrode material synthesized with 30% Co rapidly lost ∼34% of the initial loading of Co; thereafter, it was obsd. to exhibit stable activity for HER with no further loss of Co.  D. functional theory calcns. indicate that the S22- sites are the most important for HER and the presence of Co influences the S22- sites such that the H binding energy at sufficiently high H coverage is decreased compared to Ru sulfide.  Although showing high HER activity in a flow cell, the reverse reaction of H oxidn. is slow on the RuS2 catalysts tested when compared to Pt and Rh sulfide, leaving Rh sulfide as the only suitable tested material for a regenerative HBr cell due its stability compared to Pt. [on SciFinder(R)]</style></abstract><issue><style face="normal" font="default" size="100%">1</style></issue><notes><style face="normal" font="default" size="100%">CAPLUS AN 2012:1776190(Journal; Online Computer File)</style></notes></record></records></xml>