In the 70s, Honda and Fujishima popularized photocatalysis by synthesizing this gas on a platinum electrode. For 10 points each:
[10e] Name this fuel gas which is said to be “green” when it’s synthesized by electrolyzing water using renewable energy.
ANSWER: hydrogen gas [or H2; or diatomic hydrogen; or molecular hydrogen; reject just “H”]
[10m] Honda and Fujishima’s photocatalyst was an electrode coated in this inorganic molecule, which harvests light and passes electrons to the platinum cathode. Superhydrophilicity was also discovered in this oxide.
ANSWER: titanium dioxide [or TiO2; or titania; or anatase; or titanium (IV) oxide; prompt on titanium oxide; reject “titanium”]
[10h] Modern photocatalysts for water splitting combine a semiconducting component with one of these materials, like rhodium or cobalt oxyhydroxide. These deposited metal or metal oxide nanoparticles increase photocatalytic efficiency by acting as sinks for electrons and holes.
ANSWER: cocatalysts [reject “catalysts”]
<VD, Chemistry>