02605nas a2200205   4500008004100000022001400041245010700055210006900162260011000231300001600341490000600357520176600363100002402129700001802153700001602171700002602187700002702213700003002240856012902270       2015                        eng d  a2040-336400aM-Au/TiO2 (M = Ag, Pd, and Pt) nanophotocatalyst for overall solar water splitting: role of interfaces0 aMAuTiO2 M Ag Pd and Pt nanophotocatalyst for overall solar water  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL  a13477-134880 v73 a<p>M-Au/TiO2 (M = Ag, Pd, Pt) composites were prepared through a facile one-pot photodeposition synthesis and evaluated for solar water splitting (SWS) with and without a sacrificial agent. The M-Au combination exhibits a dominant role in augmenting the H2 generation activity by forming a bi-metallic system. Degussa P25 was used as a TiO2 substrate to photodeposit Au followed by Au + M (M = Ag/Pd/Pt). The SWS activity of the M-Au/TiO2 was determined through photocatalytic H-2 production in the presence of methanol as a sacrificial agent under one sun conditions with an AM1.5 filter. The highest H-2 yield was observed for Pt-0.5-Au-1/TiO2 and was around 1.3 +/- 0.07 mmol h(-1) g(-1), with an apparent quantum yield (AQY) of 6.4%. Pt-0.5-Au-1/TiO2 also demonstrated the same activity for 25 cycles of five hours each for 125 h. Critically, the same Pt-0.5-Au-1/TiO2 catalyst was active in overall SWS (OSWS) without any sacrificial agent, with an AQY = 0.8%. The amount of Au and/or Pt was varied to obtain the optimum composition and it was found that the Pt0.5-Au1/TiO2 composition exhibits the best activity. Detailed characterization by physico-chemical, spectral and microscopy measurements was carried out to obtain an in-depth understanding of the origin of the photocatalytic activity of Pt-0.5-Au-1/TiO2. These in-depth studies show that gold interacts predominantly with oxygen vacancies present on titania surfaces, and Pt preferentially interacts with gold for an effective electron-hole pair separation at Pt-Au interfaces and electron storage in metal particles. The Pt in Pt-0.5-Au-1/TiO2 is electronically and catalytically different from the Pt in Pt/TiO2 and it is predicted that the former suppresses the oxygen reduction reaction.</p>1 aMelvin, Ambrose, A.1 aIllath, Kavya1 aDas, Tanmay1 aRaja, Thirumalaiswamy1 aBhattacharyya, Somnath1 aGopinath, Chinnakonda, S.  uhttps://library.ncl.res.in/content/m-autio2-m-ag-pd-and-pt-nanophotocatalyst-overall-solar-water-splitting-role-interfaces-001617nas a2200241   4500008004100000245005000041210004900091260000800140300001600148490000700164520091300171100002201084700002201106700001801128700001801146700001801164700003201182700001901214700001601233700002001249700002401269856008201293       2017                        eng d00aMulti-mode hydrogen storage in nanocontainers0 aMultimode hydrogen storage in nanocontainers  cAUG  a24256-242620 v423 aHydrogen can be stored in containers or in materials (in molecular or atomic forms). The atomic form can further exist as multiple phases. Molecular hydrogen can be adsorbed on the surface or can be present inside the material. By invoking multiple modes of hydrogen storage, we establish a paradigm shift in the philosophy of hydrogen storage. Using a novel strategy of storage of molecular hydrogen in metal (Pd) nanocontainers, we observe that 18% hydrogen is in molecular form. Interestingly, this is achieved at 25 °C and 1 atm pressure; which is in contrast to storage in MOFs and carbonaceous materials like nanotubes. Enhancement in storage capacity as compared to Pd nanocrystals of the same mass is observed (36% increase at 1 atm & 25 °C), along with fast kinetics (0.5 wt% hydrogen absorption in 5 s). A new mechanism for hydrogen storage involving the dual catalytic role of Pd is established.1 aShervani, Suboohi1 aMukherjee, Puspal1 aGupta, Anshul1 aMishra, Gargi1 aIllath, Kavya1 aAjithkumar, Thallaseril, G.1 aSivakumar, Sri1 aSen, Pratik1 aBalani, Kantesh1 aSubramaniam, Anandh  uhttps://library.ncl.res.in/content/multi-mode-hydrogen-storage-nanocontainers