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Photoelectrocatalytic H2 evolution from integrated photocatalysts adsorbed on NiO†
Chemical Science ( IF 7.6 ) Pub Date : 2018-10-04 00:00:00 , DOI: 10.1039/c8sc02575d Nils Põldme 1 , Laura O'Reilly 2 , Ian Fletcher 3 , Jose Portoles 3 , Igor V Sazanovich 4 , Michael Towrie 4 , Conor Long 2 , Johannes G Vos 2 , Mary T Pryce 2 , Elizabeth A Gibson 1
Chemical Science ( IF 7.6 ) Pub Date : 2018-10-04 00:00:00 , DOI: 10.1039/c8sc02575d Nils Põldme 1 , Laura O'Reilly 2 , Ian Fletcher 3 , Jose Portoles 3 , Igor V Sazanovich 4 , Michael Towrie 4 , Conor Long 2 , Johannes G Vos 2 , Mary T Pryce 2 , Elizabeth A Gibson 1
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A new approach to increasing the faradaic efficiency of dye-sensitised photocathodes for H2 evolution from water, using integrated photocatalysts, furnished with ester groups on the peripheral ligands, [Ru(decb)2(bpt)PdCl(H2O)](PF6)2 (1) and [Ru(decb)2(2,5-bpp)PtI(CH3CN)](PF6)2 (2), (decb = 4,4′-diethylcarboxy-2,2′-bipyridine, bpp = 2,2':5′,2′′-terpyridine, bpt = 3,5-bis(2-pyridyl)-1,2,4-triazole) is described. Overall, 1|NiO is superior to previously reported photocathodes, producing photocurrent densities of 30–35 μA cm−2 at an applied bias of −0.2 V vs. Ag/AgCl over 1 hour of continuous white light irradiation, resulting in the generation of 0.41 μmol h−1 cm−2 of H2 with faradaic efficiencies of up to 90%. Furthermore, surface analysis of the photocathodes before and after photoelectrocatalysis revealed that the ruthenium bipyridyl chromophore and Pd catalytic centre (1) were photochemically stable, highlighting the benefits of the approach towards robust, hybrid solar-to-fuel devices.
中文翻译：
NiO 上吸附的集成光催化剂光电催化析氢†
一种提高染料敏化光电阴极从水中析出 H 2的法拉第效率的新方法，使用外围配体上带有酯基的集成光催化剂，[Ru(decb) 2 (bpt)PdCl(H 2 O)]( PF 6 ) 2 ( 1 ) 和 [Ru(decb) 2 (2,5-bpp)PtI(CH 3 CN)](PF 6 ) 2 ( 2 ), (decb = 4,4′-二乙基羧基-2,2描述了'-联吡啶，bpp = 2,2':5',2''-三联吡啶，bpt = 3,5-双(2-吡啶基)-1,2,4-三唑)。总体而言， 1 |NiO 优于之前报道的光电阴极，在持续白光照射 1 小时内，在施加 -0.2 V 偏压（相对于Ag/AgCl）时产生 30–35 μA cm -2的光电流密度，从而产生0.41 μmol h -1 cm -2的H 2法拉第效率高达90%。此外，光电催化前后光电阴极的表面分析表明，钌联吡啶发色团和 Pd 催化中心 ( 1 ) 具有光化学稳定性，突出了该方法对稳健的混合太阳能-燃料装置的好处。
更新日期：2018-10-04
中文翻译：
NiO 上吸附的集成光催化剂光电催化析氢†
一种提高染料敏化光电阴极从水中析出 H 2的法拉第效率的新方法，使用外围配体上带有酯基的集成光催化剂，[Ru(decb) 2 (bpt)PdCl(H 2 O)]( PF 6 ) 2 ( 1 ) 和 [Ru(decb) 2 (2,5-bpp)PtI(CH 3 CN)](PF 6 ) 2 ( 2 ), (decb = 4,4′-二乙基羧基-2,2描述了'-联吡啶，bpp = 2,2':5',2''-三联吡啶，bpt = 3,5-双(2-吡啶基)-1,2,4-三唑)。总体而言， 1 |NiO 优于之前报道的光电阴极，在持续白光照射 1 小时内，在施加 -0.2 V 偏压（相对于Ag/AgCl）时产生 30–35 μA cm -2的光电流密度，从而产生0.41 μmol h -1 cm -2的H 2法拉第效率高达90%。此外，光电催化前后光电阴极的表面分析表明，钌联吡啶发色团和 Pd 催化中心 ( 1 ) 具有光化学稳定性，突出了该方法对稳健的混合太阳能-燃料装置的好处。
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