000265376 001__ 265376
000265376 005__ 20190517053813.0
000265376 0247_ $$a10.1038/s41560-019-0373-7$$2doi
000265376 037__ $$aARTICLE
000265376 245__ $$aA thermally synergistic photo-electrochemical hydrogen generator operating under concentrated solar irradiation
000265376 260__ $$c2019-04-29
000265376 269__ $$a2019-04-29
000265376 336__ $$aJournal Articles
000265376 520__ $$aAchieving high current densities while maintaining high energy conversion efficiency is one of the main challenges for enhanc-ing the competitiveness of photo-electrochemical devices. We describe a concept that allows this challenge to be overcome by operating under concentrated solar irradiation (up to 474 kW m−2), using thermal integration, mass transport optimization and a close electronic integration between the photoabsorber and electrocatalyst. We quantify the increase in the theoretical maximum efficiencies resulting from thermal integration, and experimentally validate the concept using a III–V-based photoab-sorber and IrRuOx–Pt-based electrocatalysts. We reach current densities higher than 0.88 A cm−2 at calculated solar-to-hydro-gen conversion efficiencies above 15%. Device performance, dynamic response and stability are investigated, demonstrating the ability to produce hydrogen stably under varying conditions for more than two hours. The current density and output power (27 W) achieved provide a pathway for device scalability aimed towards the large-scale deployment of photo-electrochemical hydrogen production.
000265376 536__ $$aFNS$$c145936
000265376 536__ $$aFNS$$c155876
000265376 700__ $$0247649$$aTembhurne, Saurabh Yuvraj$$g236058
000265376 700__ $$0249918$$aNandjou Dongmeza, Fredy Intelligent$$g267460
000265376 700__ $$0247143$$aHaussener, Sophia$$g207354
000265376 773__ $$tNature Energy
000265376 8560_ $$falessandra.bianchi@epfl.ch
000265376 909C0 $$zMarselli, Béatrice$$xU12656$$pLRESE$$msophia.haussener@epfl.ch$$0252472
000265376 909CO $$ooai:infoscience.epfl.ch:265376$$particle$$pSTI
000265376 960__ $$asophia.haussener@epfl.ch
000265376 961__ $$aalessandra.bianchi@epfl.ch
000265376 973__ $$aEPFL$$sACCEPTED$$rREVIEWED
000265376 980__ $$aARTICLE
000265376 981__ $$aoverwrite